CASE  .  Chrome plated,  33 mm .

BACK  .  Screw, steel .

            It shows the S/N only .

MOVEMENT  .  AS 1130,  no name .

PUNCHING  .  D.  only .

                     Letter is larger (1,5mm) than numbers 

S/N  .  4 digits . The number of registered watches is small (5) 

           However , it is belived that a plausible range could be   12XX   /   16XX .

NOTE  .  Range and S/Ns are purely indicative .