The Omega Speedmaster Professional Moonwatch Ref. 310.30.42.50.01.002 is a modern interpretation of one of the most iconic chronographs in watchmaking history. Known as the "Sapphire Sandwich," this version features a sapphire crystal on the front and a sapphire exhibition caseback, allowing the wearer to appreciate both the classic Moonwatch design and its mechanical movement.

The 42mm stainless steel case features the signature asymmetrical Speedmaster profile, black stepped dial, tachymeter bezel, and three-register chronograph layout. The stainless steel bracelet completes the watch's timeless design.

Powered by Omega's Co-Axial Master Chronometer Calibre 3861, the watch offers manual winding, approximately 50 hours of power reserve, METAS-certified precision, and magnetic resistance up to 15,000 gauss.

This example is dated January 3, 2022, and comes as a full set. It remains in very good pre-owned condition, showing minimal signs of normal wear, and is running strong.

The bracelet is currently sized to fit a wrist of approximately 7 inches. Four additional bracelet links are included; however, the connecting pins and screws required to install those links are missing and would need to be sourced separately.

Brand: Omega
Collection: Speedmaster
Model: Professional Moonwatch Sapphire Sandwich
Reference: 310.30.42.50.01.002
Date: January 3, 2022
Case Size: 42mm
Case Material: Stainless Steel
Dial: Black Stepped Dial
Movement: Omega Co-Axial Master Chronometer Calibre 3861
Winding: Manual
Power Reserve: Approximately 50 Hours
Certification: METAS Master Chronometer
Crystal: Sapphire
Caseback: Sapphire Exhibition Caseback
Bezel: Black Tachymeter
Functions: Hours, Minutes, Small Seconds, Chronograph
Water Resistance: 50 Meters
Bracelet: Stainless Steel
Current Wrist Fit: Approximately 7 Inches
Extra Links: 4 Included, Missing Connecting Pins and Screws
Includes: Full Set
Condition: Very Good Pre-Owned Condition With Minimal Signs of Normal Wear. Running Strong.