Universal Geneve "Batwing" watch with box Ref. 542608 Cal. 1-42 wriswatch NOS.
The size of the watch is 28 mm. The designer is the legendary Gerald Genta, this design is included in the "White Shadow" catalog.
Dimensions (mm):
Case 28
Case with Crown 29.8
Lug to Lug Distance 31.1
Case Thickness 7
Lug Width 19
Strap Width 19