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.

Buy Now on Jomashop

This is an affiliate link

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

Omega Speedmaster Moonwatch Two-Tone Sedna Gold 310.20.42.50.99.001

Omega - 310.20.42.50.99.001

No description provided in the title or additional details.

Case material: Two-Tone Sedna Gold

Posted at

Dec 11, 2025, 4:27 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Day Date Panda 323.30.40.40.04.001 40mm

Omega - 323.30.40.40.04.001 · $3,299

A vintage-inspired Omega Speedmaster Day Date Panda watch, featuring a 40mm case size.

Bracelet length: 7.5 inches

Posted at

Dec 11, 2025, 3:08 PM

Active

View listing on r/WatchExchange

2024 Speedmaster -First Omega in Space - 310.30.40.50.06.001 - full kit - factory warranty - very good condition

Omega - 310.30.40.50.06.001

This is a 2024 Speedmaster, the first Omega in space.

Condition: very good condition
Warranty: factory warranty

Posted at

Dec 11, 2025, 1:00 PM

Active

View listing on r/WatchExchange

2024 Omega Speedmaster Moonphase 🌙 - Box and Papers

Omega - 304.33.44.52.03.001 · $6,500

2024 Omega Speedmaster Moonphase with a 44.25mm stainless steel case, blue sun-brushed dial and ceramic bezel.

Condition: Really nice used condition with a few very light marks and minor wear on the box
Case size: 44.25mm diameter
Movement: 9904
Power reserve: 60 hours

Posted at

Dec 11, 2025, 8:17 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional 42mm 310.30.42.50.01.001 | 2024 Complete Set w/ Extra Straps

Omega - 310.30.42.50.01.001 · $5,500

This Omega Speedmaster Professional is a 2024 model featuring a 42mm Hesalite crystal. It comes in a complete set with extra straps.

Condition: Fair Pre-Owned Condition with Micro-Scratches on Crystal and wear present on clasp, bracelet, and polished parts of case
Case Size: 42mm diameter
Movement: Master Chronometer

Posted at

Dec 10, 2025, 10:56 PM

Active

View listing on r/WatchExchange

Omega Speedmaster CK2998 Limited Edition “Blue Panda” - Full Set - Price Reduced!

Omega - 311.33.40.30.02.001 · $6,695

This Omega Speedmaster CK2998 Limited Edition 'Blue Panda' is a striking modern take on the classic model, featuring a 40mm stainless steel case and opaline silver dial with blue subdials. It's powered by the manual winding OMEGA calibre 1861 and comes in a complete set with various accessories.

Condition: Excellent, barely worn
Case size: 40mm
Movement type: Manual winding

Posted at

Dec 10, 2025, 7:21 PM

Active

View listing on r/WatchExchange

Omega Speedmaster FOIS | 310.30.40.50.06.001 | Complete Box & Papers 2024 | $6,899 Shipped

Omega - 310.30.40.50.06.001 · $6,899

Up for sale is an Omega Speedmaster “First Omega in Space” (FOIS) — Ref. 310.30.40.50.06.001, purchased in 2024. This model pays homage to the Speedmaster worn by astronaut Walter Schirra during the Mercury-Atlas 8 mission and remains one of the most historically faithful modern Speedmaster references.

Condition: Excellent/near-mint
Year Bought: 2024
Original Msrp: 8900
Includes: Complete Omega Inner & Outer Box, Warranty Card, Pictogram Card, Master Chronometer Card, Omega Travel Case, Cleaning Cloth, Instruction Booklets, Hang Tag

Posted at

Dec 10, 2025, 7:20 PM

Active

View listing on r/WatchExchange