Wakmann released these Big Boy's around the 60's leading up to the 70's. This particular model, the reference 13.36.00, is from the early 60's and houses the Valjoux 236 movement (based off of the Valjoux 23 which was made for over 60 years prior to 236). 
 
The Big Boy had many different models, different movements, different dials, manuafacturer variants, etc. The one offered here is a blue dial with a contrasting orange handset. The stunning dial is in excellent shape - no marks. The watch sits at roughly 40mm which makes it a perfect watch that relates to modern sizes of today. It wears absolutely comfortable on the wrist. This piece was loved as the bezel is probably the nicest bezel i've seen on a vintage watch of that era. 
 
 
Brand: Wakmann
Year: 1960's
Ref. No.: 13.36.00
Movement: Valjoux 236
Case: Chrome, steel back
Case Size: 40mm without crown
Case Thickness: 13.6
Lug Width: 20mm
Lug to Lug: 46.6mm
Crown: Original