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 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

Omega Speedmaster Reduced 39mm - Mother of Pearl Dial - Price Reduced ‼️

Omega - Speedmaster Reduced · $2,495

A super rare and unique Omega Speedmaster with a Mother of Pearl dial, available for sale today.

Condition: Decent condition, light scratching on case and hairlines on bezel
Case size: 39mm
Dial color: Mother of Pearl

Posted at

Dec 10, 2025, 6:39 PM

Active

View listing on r/WatchExchange

2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 Full Set

Omega - 310.30.42.50.04.001 · $7,477

This is a brand new 2024 Omega Speedmaster Moonwatch Professional White Dial with excellent condition and under warranty.

Condition: Excellent, minimal signs of wear
Case Material: Stainless Steel
Bracelet Length: Full links

Posted at

Dec 10, 2025, 2:51 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Moonwatch Sapphire Sandwich Full Set - 310.30.42.50.01.002

Omega - 310.30.42.50.01.002 · $6,100

A Speedmaster Moonwatch from Omega's personal collection, upgraded to a Rolex Explorer.

Condition: Very nice preowned condition
Case material: Stainless Steel
Case dimensions: 42mm diameter
Bezel: Black Bezel Stainless Steel

Posted at

Dec 10, 2025, 11:42 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Moonwatch 310.304.25.001.002 ♦️Like New 2022♦️

Omega - 310.304.25.001.002 · $6,400

A Omega Speedmaster Moonwatch from 2022, sold with a full set including box and papers.

Condition: Like New
Year: 2022
Set included: Full set (box & papers)
Payment methods: Bank Wire / Credit card (+4.9%) / Crypto

Posted at

Dec 10, 2025, 9:30 AM

Active

View listing on r/WatchExchange

[US] Omega Speedmaster Chronoscope - White Panda Dial - 43mm - 329.30.43.51.02.002

Omega - 329.30.43.51.02.002 · $5,150

This Omega Speedmaster Chronoscope features a 43mm case size, white panda dial, and includes the original box, user manual, and other accessories.

Condition: Fantastic condition with minor hairlines on clasp and bracelet
Case Size: 43mm
Dial Color: white panda

Posted at

Dec 10, 2025, 8:22 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch 42mm FULL SET! Ref. 310.30.42.50.01.001 — $5,500

Omega - 310.30.42.50.01.001 · $5,500

This Omega Speedmaster Professional Moonwatch is a 42mm stainless steel watch with a black dial and engraved caseback, featuring a co-axial master chronometer movement with a power reserve of approximately 50 hours. It comes as a full set with original boxes and papers.

Condition: Very Good used condition
Case size: 42mm diameter
Crystal type: Hesalite crystal

Posted at

Dec 9, 2025, 8:45 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced Automatic GREAT SET w/ Original Papers & Omega Service Paperwork!

Omega - Speedmaster Reduced · $2,850

A classic Omega Speedmaster Reduced in excellent condition, complete with original papers and Omega service history. This watch features a 39mm stainless case, automatic movement serviced by Omega in 2018, and an original Omega bracelet.

Condition: Excellent, lightly worn vintage watch with some signs of age
Case size: 39mm diameter
Bracelet size: adjusts to 6.7-7.1 inches with extra links
Movement service history: fully serviced by Omega in 2018

Posted at

Dec 9, 2025, 8:26 PM

Active

View listing on r/WatchExchange