• Omega Speedmaster W1690_3
  • Omega Speedmaster W1690_2
  • Omega Speedmaster W1690_4
  • Omega Speedmaster W1690_5

Omega Speedmaster Moonwatch “Sapphire Sandwich” 3873.50.31

ref W1690 /


  • MAN REF 3873.50.31
  • BRACELET leather with deployant clasp
  • MOVEMENT Manual winding


Featuring a sapphire glass and sapphire glass caseback, our Omega Speedmaster Professional Moonwatch is also known as the "sapphire sandwich", reference 3873.50.31.  The caseback enables perfect visibility of the cal 1863 movement. Our example comes as a complete set, comprising inner and outer box, wallet, and card stamped by one of the Omega Boutiques (UK) and is updated but accompanied by the original sales receipt, 2013. Presented in outstanding condition and with little sign of use,  this rarer reference Speedmaster is factory fitted with an Omega black leather strap and deployant clasp, and this model is now discontinued, with a relatively short production run from 2007-2012.   Note: We do hold a relevant and correct period Speedmaster professional stainless steel bracelet which can be additionally purchased and fitted at point of sale if desired.


  • BRACELET max 200mm
  • CONDITION Outstanding
  • CASE 42mm