CASE . Chrome plated , 34mm .

            Very often , on the back of the right upper lug are punched three digits : they correspond

            to the last three digits of the S/N punched inside the back .

BACK . Screw  ,  steel .

            Outside only shows the S/N and the Helvetia code number ( 3190).

            Inside there is a punched number .

MOVEMENT . Helvetia “ Cal. 82/A “.

                       The brand’s name is on the ratchet wheel .

PUNCHING .  D.H. only .

                    It is small and uniform .

S/N . 5 digits . For a very small number of watches it is 3 0r 4 digits .

        From the registered watches ( 75 ) , it tourned out that the batches could be 4 :

        1.  3 or 4 digits  :  3Xx  /  94XX ;

        2.  5 digits  :  100XX  /  129XX  ;

        3.  5 digits  :  150XX  /  280XX  ;

        4.  5 digits  :  331XX  /  356XX  .

NOTE .  Batches and S/Ns are purely indicative .