Omega Constellation watches are quite interesting as they come in many different shapes and dial variants. The watch is very clean with all its original parts including crystal, crown which are hard to replace if missing. The watch comes on a NOS Exotic leather band from the 70's. 
 
Details:
 
Brand: Omega 
Model: Constellation
Reference: 168.004
Year: 1966
Material: Stainless Steel
Dimensions:  35.5mm
Crystal:  Plexiglass
Movement: Automatic Cal 561
Bracelet/Strap: Original Bracelet
Box/Papers: No/No