CASE    Chrome plated,  34 mm . 

BACK    Screw,  steel  

           In addition to the S/N shows “wasserdicht”  and  “stahlboden” . 

MOVEMENT  .  AS 1130,   no-name . 

CASEBACK MARKINGS:   D. U.  only .

                     Letters are larger (2mm) than numbers (1mm) .

S/N  .  The small number of registered watches (2) does not allow to define a range .