Replica Omega Speedmaster Hand Wound SeriesOmega Speedmaster Professional Moonwatch Sapphire Sandwich / Strap (3873.50.31)

Brand: Omega Replica
Series: Speedmaster Hand Wound
Model: 3873.50.31
Dial Color: Black
Dial Indexes: Stick / Dot
Dial Hands: Stick
MBrand:Omega
Caliber:1863
Base:Omega 1861
Display:Analog
Diameter:27.00 mm
Jewels:18
Reserve:48 h
Frequency:21600 bph
Time:Hours, Minutes, Small Seconds
Chronograph:Chronograph
Luxury version of the 1861. Replacement for the 863.
Case Material:Stainless steel
Case Glass:Sapphire
Case Back:Open
Case Shape:Round
Case Diameter:42.00 mm
Case Lug Width:20.00 mm
Bezel:Tachymeter
W/R:50.00 m
The Omega Speedmaster Professional reference 3873.50.31 is often called the 'Sapphire Sandwich' due to its sapphire glasses both front and back. It was in production from 2002 to 2015. Reference 3573.50.00 is similar though fitted with a stainless steel bracelet.