Cult (Renault FT-17 tank shape inspired) original Swiss Herbelin 2673 here. Dimensions: 24mm (crown excluded) x 31mm. 19mm lugs. Quality ETA Caliber inside with 1979 production date. Watch works, but it has not been serviced for regular use. There is a rich watchmaker's service history hand-etched into the perlage of the inner case back. 

The gold plating with hallmark P S.G. (Société Générale des Boîtes case manufacture). The decorative blue cabochon gem on the tip of the crown is missing. Suggestion: install a fitting gemstone of your choice. 

While this is a man's watch I am sure it is highly attractive for both sexes. 

If you like this style of watches you need to see also: https://www.ebay.com/itm/327319731019