Omega Speedmaster Calibre 321 42mm platinum on leather strap

The OMEGA Speedmaster is one of world’s most iconic timepieces. Having been a part of all six lunar missions, the legendary chronograph is an impressive representation of the brand’s adventurous pioneering spirit.
Presented on a black leather strap, this platinum model houses the iconic OMEGA Calibre 321, a movement that has been reborn for today using original specifications. Wearers can view the calibre through the sapphire-crystal caseback of the 42 mm timepiece, which has been crafted from a special platinum alloy with the use of gold (Pt950Au20).
The design also includes a black ceramic bezel with a white enamel tachymeter scale. Most notable is the step dial in black onyx, which uses 18K white gold for the indexes, and most hands. The vintage OMEGA logo is in 18K white gold. The design is completed by three unique subdials formed from a lunar meteorite, the same used for the Speedmaster Apollo 11 50th Anniversary Limited Edition in Moonshine Gold.
Features
Chronograph
The chronograph function is a mechanism for measuring time intervals. A chronograph watch can therefore be used to time events while displaying the time like any traditional watch.
Small seconds
A hand on a sub-dial which tracks seconds typically it completes a full rotation in one minute.
Tachymeter
A tachymeter watch has a function for measuring speed. It is a chronograph with a graduated dial on which speed can be read in kilometres per hour based on a 1000 metre distance.
Transparent caseback
A transparent caseback – frequently made of sapphire – makes it possible to see the movement inside the watch.
Technical Data
Reference
311.93.42.30.99.001
Between lugs 20mm
Lug-to-lug 47.6mm
Thickness 13.4mm
Case diameter 42mm
Case
Platinum
Dial colour Black
Crystal
Scratch-resistant sapphire crystal with anti-reflective treatment on both sides
Water resistance
5 bar (50metres / 165 feet)
Total product weight (approx.)
125 g
Calibre: Replica Omega 321
Movement Type Manual-winding
Power reserve 55 hours
Case Measurements
1. Between lugs This measures the space where a strap or bracelet would be placed.
2. Lug-to-lug
This is the full length of the case, from the top lugs to the bottom lugs.
3. Case diameter This is the full width of the watch’s case, excluding the crown and pushers.
4. Thickness When viewed from the side, this measures from the base of the watch to the surface of the glass.
Bracelet
Strap color Black
Material Leather strap
Strap underside Non-grained alligator leather
Buckle type Pin buckle
Buckle material Platinum