OMEGA RD9906 Plc Temperature Modules RD9900

( Brand: Omega ), ( Manufacturer Part Number: RD9906 ), ( Part Type: Module )

Review OMEGA

The **Omega Seamaster Diver 300M (Reference RD9906)** and its predecessor, the **Seamaster 300M (Reference RD9900)**, represent the pinnacle of Omega s legendary diving watch heritage, blending cutting-edge technology with timeless elegance to create a timepiece that is as functional as it is iconic. Both models are the direct descendants of the legendary **Seamaster 300M**, the first watch to be certified for 300 meters of water resistance, a feat achieved in 1957. The RD9906 and RD9900 embody this legacy while incorporating modern advancements, making them the ultimate choice for divers, collectors, and enthusiasts alike.

At the heart of these timepieces lies Omega s **Co-Axial Master Chronometer** movement, the **Calibre 8800**, a masterpiece of horological engineering that delivers unparalleled precision and reliability. This automatic movement features Omega s proprietary **Co-Axial escapement**, a three-wheel design that eliminates friction between the escapement and pallet stones, resulting in an accuracy of 0.5 seconds per day a level of precision that surpasses the standards set by the Geneva Observatory. The movement is also certified as a **Master Chronometer** by the Swiss Federal Office of Metrology (METAS), ensuring its exceptional performance across a wide range of temperatures and magnetic fields. Additionally, the Calibre 8800 is **COSC-certified**, guaranteeing its compliance with the rigorous standards of the Swiss chronometer industry.

The RD9906 and RD9900 share a robust and sophisticated case design that pays homage to the original 300M while introducing subtle yet meaningful updates. Both models feature a **40mm stainless steel case** with a **cyclops lens** magnifying the date window at 3 o clock, a detail that enhances readability without compromising the watch s sleek profile. The case back is not only water-resistant to 300 meters but also serves as a functional dive computer display, complete with a **depth gauge, dive time, and ascent rate** a nod to the watch s diving heritage. The case is secured by a **unidirectional rotating bezel** with a **rotating crown**, allowing for quick adjustments even while wearing gloves, a feature that diver-watch enthusiasts will appreciate. The case is finished with **Omega s signature satin-polished surfaces**, adding a touch of sophistication to its utilitarian design.

The **stainless steel bracelet** on both models is a refined take on the classic diver s bracelet, featuring **Omega s signature links** with a slightly textured finish that enhances grip and durability. The bracelet is secured with a **quick-release clasp**, making it easy to remove and replace, while the **folding deployment clasp** ensures a secure fit. The bracelet s design is both functional and elegant, complementing the watch s overall aesthetic without overwhelming it.

The dial of the RD9906 and RD9900 is a study in contrast and clarity, with a **black or white background** (depending on the model variant) that serves as a striking canvas for the watch s features. The **applied hour markers** are rendered in **Super-LumiNova**, a luminescent material that ensures visibility in low-light conditions, while the **hands** are equally luminous, providing unmatched legibility. The **date window** at 3 o clock is framed by a **cyclops lens**, allowing for easy reading of the date at a glance. The **30-minute subdial** at 6 o clock is a subtle yet functional detail, adding to the watch s diving heritage. The dial is finished with a **matte or satin texture**, depending on the variant, which enhances the watch s tactile appeal and complements its modern yet timeless design.

One of the most distinctive features of the RD9906 and RD9900 is their **caseback**, which transforms the watch into a **diving computer** with a single press of the crown. The caseback displays **depth, dive time, and ascent rate**, making it an indispensable tool for divers. The **glossy or matte caseback** is finished with a **satin-polished bezel**, adding a touch of luxury to the watch s functional design. The caseback is also **anti-reflective**, ensuring that the display remains clear even in bright sunlight.

The RD9906 and RD9900 are available in two primary color schemes: the **black dial with a black bracelet** (RD9906) and the **white dial with a white bracelet** (RD9900). The black variant exudes a classic, understated elegance, making it a versatile choice for both formal and casual occasions. The white variant, on the other hand, offers a more contemporary and eye-catching look, with its bright dial and bracelet creating a striking contrast against the skin. Both versions are finished with **Omega s signature satin-polished case and bracelet**, ensuring a premium feel that is both durable and luxurious.

Beyond their technical and aesthetic merits, the RD9906 and RD9900 are imbued with Omega s rich history and commitment to innovation. The Seamaster 300M has been a symbol of adventure and exploration since its inception, and these modern interpretations carry on that legacy with a blend of heritage and cutting-edge technology. Whether worn as a statement piece, a diving companion, or a daily wear timepiece, the RD9906 and RD9900 are undeniably some of the most sophisticated and versatile watches Omega has ever produced.

In summary, the **Omega Seamaster Diver 300M (RD9906 and RD9900)** is more than just a watch it is a masterpiece of horological craftsmanship, a tribute to diving heritage, and a testament to Omega s enduring legacy. With its **Co-Axial Master Chronometer movement, diving computer caseback, and timeless design**, these timepieces offer a perfect fusion of function and fashion, making them a must-have for anyone who appreciates excellence in watchmaking.

### **Pros and Cons of buying a Omega Seamaster Diver 300M (RD9906/RD9900)**

#### **Pros**

1. **Legendary Brand Prestige**

Omega is one of the most respected luxury watch brands in the world, with a history dating back to 1925. Owning a Seamaster Diver 300M carries significant prestige, especially in the watch community and among collectors.

2. **Exceptional Craftsmanship and Build Quality**

The RD9906 and RD9900 are known for their robust construction. They feature a **brilliant-cut sapphire crystal**, a **unibody case**, and a **screw-down caseback**, ensuring water resistance up to **300 meters**. The case is made of **stainless steel**, providing durability and resistance to corrosion.

3. **Chronograph Functionality (RD9906)**

The **RD9906** includes a **chronograph function** with a **tachymeter bezel**, making it a versatile timepiece for both everyday wear and precision timing. The **Omega Co-Axial Escapement** ensures high accuracy and longevity.

4. **High-End Movement (Co-Axial Chronograph)**

Both models use **Omega s proprietary Co-Axial escapement**, which is known for its **low maintenance, high accuracy, and resistance to magnetic fields**. This movement is also **self-compensating**, reducing the need for frequent servicing.

5. **Classic Diver Design with Modern Appeal**

The **RD9900** (non-chronograph) and **RD9906** (chronograph) retain the **iconic Seamaster Diver silhouette** a round case, unidirectional bezel, and a bold, legible dial. The **RD9906** adds a sporty, functional twist with its chronograph sub-dials, while the **RD9900** offers a more classic diver look.

6. **Resale Value and Investment Potential**

Omega watches, especially limited editions and high-demand models like the Seamaster Diver 300M, tend to **retain or appreciate in value** over time. This makes them a strong **long-term investment** for collectors.

7. **Water Resistance and Durability**

Both models are **certified for 300 meters (1,000 feet)**, making them suitable for swimming, diving, and general water exposure. The **screw-down crown and caseback** ensure reliability in harsh conditions.

8. **Versatile Strap Options**

The **steel bracelet** (standard on both models) is durable and classic, but Omega also offers **leather straps** (for the RD9900) and **rubber straps** (for the RD9906), allowing for different styling options.

9. **Omega s Reputation for Reliability**

Omega is known for **long-lasting movements** with **low failure rates**. The Co-Axial escapement is particularly durable, reducing the risk of mechanical issues over time.

10. **Limited Editions and Exclusivity**

Some versions of the Seamaster Diver 300M (such as the **RD9906.10.50.01.00.001** or **RD9900.10.50.01.00.001**) are **highly sought-after**, adding to their exclusivity and collectibility.

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#### **Cons**

1. **High Price Tag**

The **RD9906** typically retails around **$10,000 $12,000**, while the **RD9900** is slightly cheaper but still **$8,000 $10,000**. This makes them **expensive** compared to other luxury divers like Rolex Submariners or Grand Seikos.

2. **Potential for Overpaying in the Secondary Market**

Due to their popularity, **pre-owned Omega Seamaster Divers can sell for significantly more than their original MSRP**, especially for limited editions. Buyers may end up paying **$15,000 ** for a used example.

3. **Weight and Bulk**

The **steel case (42mm)** is **heavier and bulkier** than some modern divers (e.g., Rolex Submariner 41mm). While this adds to their robustness, it may not be as comfortable for all wearers.

4. **Chronograph Complexity (RD9906)**

The **RD9906 s chronograph function** adds mechanical complexity, which while durable requires **more precise handling** than a simple diver. Misuse (e.g., winding while running) can lead to damage.

5. **Limited Customization Options**

Unlike some brands (e.g., Rolex), Omega offers **fewer customization choices** in terms of dial colors, strap materials, or case finishes. The **RD9906 and RD9900** come in **standard configurations**, limiting personalization.

6. **Movement Servicing Costs**

While Omega movements are reliable, **servicing a Co-Axial chronograph can be expensive** (typically **$1,000 $1,500** per service). This adds to long-term ownership costs.

7. **Potential for Counterfeit Market**

Omega watches are **highly counterfeited**, especially in online marketplaces. Buyers must **verify authenticity** through **serial number checks, movement inspection, and reputable sellers** to avoid fakes.

8. **Less "Wearable" Than Some Modern Divers**

The **42mm case** is **larger than many contemporary divers**, which may not suit those who prefer a **slimmer, more discreet** timepiece.

9. **No Automatic Winding Option (RD9900)**

The **RD9900** is a **manual-wind movement**, meaning it requires **daily winding** (unlike automatic watches). While durable, this can be inconvenient for some wearers.

10. **Omega s Reputation for Delays and Production Issues**

Omega has faced **criticism in the past for production delays, quality control issues, and slow customer service**. Some buyers report **long wait times for repairs or replacements**.

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### **Conclusion and Recommendation**

#### **Who Should Buy the Omega Seamaster Diver 300M (RD9906/RD9900)?**

- **Watch collectors and investors** who value **brand prestige and long-term appreciation**.

- **Enthusiasts of Omega s Co-Axial movement** and **chronograph functionality** (RD9906).

- **Those who prioritize durability, water resistance, and mechanical reliability**.

- **People who appreciate classic diver designs** with a **sporty yet elegant** aesthetic.

- **Buyers willing to pay a premium** for a **high-quality, timeless timepiece**.

#### **Who Should Avoid It?**

- **Budget-conscious buyers** if you can find a **Rolex Submariner, Grand Seiko, or Tudor Black Bay** at a lower price with similar features.

- **Those who prefer automatic winding** the **RD9900** requires manual winding.

- **People who dislike bulky watches** the **42mm case** is larger than many modern divers.

- **Casual wearers who don t care about brand prestige** if you just want a **functional, affordable diver**, other options exist.

- **Buyers who dislike chronographs** the **RD9906 s complexity** may not appeal to everyone.

#### **Final Recommendation**

If you **value Omega s heritage, the Co-Axial movement, and a **legendary diver design**, the **Seamaster Diver 300M (RD9906 or RD9900)** is a **strong investment** and a **wonderful addition to any collection**.

- **Choose the RD9906** if you want **chronograph functionality** and a **more sporty** look.

- **Choose the RD9900** if you prefer a **classic diver** with a **simpler, more elegant** design.

**Buy from a reputable dealer** (e.g., Omega Authorized Service Centers, trusted watch retailers) to **avoid counterfeits and ensure authenticity**.

For most buyers, the **RD9906** offers the best **balance of functionality, prestige, and long-term value**, making it the **top recommendation** among the two. However, if you **prefer a simpler, more traditional diver**, the **RD9900** is still an excellent choice.

Details:

However, when we move the unit out, screen has been scratched. I will sell it as is no, return this unit.By the way never been used This unit was working in good condition.

part #: rd9906 prices

• $745.00-$2999.00

specifications temperaturcontr:

• brand: Omega
• mpn: Rd9906
• part type: Module

returns temperaturcontr:

• policy: No Returns

offer temperaturcontr:

• availability: In Stock
• started: March 5, 2026
• quantity: 1
• sold: 0
• best offers: True
• options: Ship-to-home

payments temperaturcontr:

• credit card: Visa
• other
• wallet: Google-pay

seller temperaturcontr:

• city: wood land Hills, California
• rating: 100.0%
• # reviews: 1

shipping temperaturcontr:

• cost: $29.95
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS
• transit: 5-11 Days
• type: Fixed

general temperaturcontr:

• PLCs HMIs > PLC Peripheral Modules > PLC Temperature Modules
• condition: Used