Omega Speedmaster Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

Reference 3873.50.31

Omega Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

About this watch

The Omega Speedmaster Professional Moonwatch Sapphire Sandwich, also known as the 3873.50.31, is a testament to the brand's rich history and commitment to precision. This luxury watch features a stunning black dial with contrasting white stick and dot indexes, giving it a classic yet modern vibe suitable for both formal and casual occasions. The round stainless-steel case strikes a perfect balance between presence and elegance, measuring 42mm in diameter. A sapphire crystal on both the front and back of the watch enhances durability and provides a stunning view of the intricate movement through the open case back. With its iconic design, reliable Omega caliber 1863 movement, and versatile wearability, this watch earns its place in any collection. Whether you're a history buff, a watch connoisseur, or someone looking to elevate your style, the Speedmaster is a worthy companion. It's not just about telling time; it's about cherishing every moment.

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MSRP: $5,400

Market Price: $3,887

Key Features

Omega caliber 1863 movement
48-hour power reserve
21,600 vibrations per hour
Chronograph function for timing events
Sapphire crystal on front and back of the watch
Water resistance up to 50 meters
Leather strap with secure buckle

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

Reference

3873.50.31

Movement

1863

Movement Features

Hours, Minutes, Small Seconds
Chronograph

Case

Stainless Steel 42mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

Current Listings

20mm Black Omega Speedmaster Rubber Strap and Deployant Clasp

Omega - Speedmaster · $499

Up for sale is this extremely comfortable Omega Strap and Clasp, **Like New**, with a moon surface texture on the underside.

Condition: Excellent
Size: Medium / Standard
Strap width: 20mm

Posted at

Mar 21, 2026, 12:36 AM

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Omega Speedmaster 39mm $2500

Omega - 39mm · $2,500

A Omega Speedmaster 39mm is being listed for sale, with the original purchase from eBay in Japan a few years ago. The watch may have been serviced but no guarantees are made.

Case diameter: 39mm

Posted at

Mar 20, 2026, 11:12 PM

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Omega Speedmaster Professional “Reverse Panda” 42MM - 310.30.42.50.01.004 (NEW / UNWORN 2026 COMPLETE SET)

Omega - 310.30.42.50.01.004 · $10,500

A 42MM Omega Speedmaster Professional 'Reverse Panda' with all original packaging and accessories, in pristine condition.

Condition: New / Unworn
Size: 42mm diameter
Included accessories: outer sleeve, outer box, inner box, all cards, x2 manuals, AD shipping coffin, serialized hangtag, UPC Sticker, microfiber, travel case

Posted at

Mar 20, 2026, 10:10 PM

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2025 Omega Speedmaster Professional “Sapphire Sandwich” Ref. 310.30.42.50.01.002 | Full Set | Warranty to 2030 | + OEM Sailcloth

Omega - 310.30.42.50.01.002 · $7,050

The Omega Speedmaster Professional 'Sapphire Sandwich' is a 2025 model, featuring a stainless steel case with sapphire front and caseback.

Condition: Excellent
Calibre: 3861 Co-Axial Master Chronometer
Case Size: 42mm diameter
Material: stainless steel

Posted at

Mar 20, 2026, 7:21 PM

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Omega Speedmaster Professional “Chocolate Dial” 42mm Ref. 311.30.42.30.13.001 Sapphire Sandwich, Full Set, Excellent Condition

Omega - 311.30.42.30.13.001 · $6,695

This Omega Speedmaster Professional features a unique chocolate dial and sapphire crystal, showcasing the beautifully finished Caliber 1863 movement.

Condition: Excellent pre-owned
Case size: 42mm
Case material: Stainless Steel
Dial color: Brown 'Chocolate' Dial (tropical-inspired)

Posted at

Mar 20, 2026, 7:01 PM

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Omega Speedmaster Reduced 3510.50 Excellent Condition + Serialized Hand Tag

Omega - 3510.50 · $2,550

For sale is an Omega Speedmaster Reduced 3510.50 in excellent condition with hardly any signs of wear, comes with serialized hand tag and functions properly.

Condition: Excellent condition
Serialized hand tag: yes

Posted at

Mar 20, 2026, 4:18 PM

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Omega Speedmaster Racing 329.30.44.51.04.001 COMPLETE SET 2024

Omega - 329.30.44.51.04.001 · $5,950

This Omega Speedmaster Racing features a white dial and comes with the complete set including double boxed, all the cards, warranty card dated 2024, and manual.

Condition: Excellent
Payment Methods: crypto, credit/debit card, other methods (excluding PayPal)
Trading Brands: Tudor, Cartier, Rolex, Omega, Breitling, AP
Shipping: shipped

Posted at

Mar 20, 2026, 4:15 PM

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[CONUS] 1965 Omega Speedmaster 105.003 Ed White Pre-Moon Caliber 321

Omega - 105.003-65 · $9,300

A 1965 Omega Speedmaster Pre-Moon 105.003 Ed White watch, certified by NASA for space missions. This is one of the three references that were on the Moon and features a very beautiful dial with minimal signs of wear.

Condition: Very good with minimal signs of wear
Dial condition: very beautiful dial
Bezel condition: original aluminium bezel with DON, some wear throughout
Case size: 40mm diameter

Posted at

Mar 20, 2026, 11:48 AM

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