Wittnauer skin diver on Swiss tropic. Runs great. Near NOS.
Maker: Wittnauer
Model: Skin Diver
Reference: 4000
Year: 1960s
Case No: NA
Material: Stainless steel
Dimensions: 38mm diameter; 11mm thickness
Crystal: Plexiglass
Lume: Tritium
Caliber: Manual-winding caliber C11-KS- $550 Net to me based upon your method of payment.

Runs and keeps time. No service history known. Great cheap fun piece. Over a decade of references here, eBay, and the major forums.

More pics here: