CASE  .  Two types :

          –  stainless steel, 35 mm ;

          –  chrome plated, 35mm .

BACK  .  screw,  steel .

           Outside reports the S/N only . Inside there are : “zenith” and “ acier inoxidable” .

           In some  cases , inside , there are also : “brevet”  and the Swiss cross .

MOVEMENT  .  Zenith  “Cal. 12.4.6 “ .

                      Brand name and the S/N of the movement           

                      It does not have the movement  stop ring but a dust-cover 

CASEBACK MARKINGS:  D. H.  only . 

                       Letters and numbers have the same size (2mm) and punching is semi-circular .

S/MN  .  7 digits  . It is assumed that the first three numbers can identify the batch 

               while the next ones are the true S/N .

               From the registered watches (109) there were 4 possible batches with the following ranges :

               1.  83720XX   /   83796XX   stainless steel case ;

               2.  83802XX   /   83813XX   stainless steel case ;

               3.  83940XX   /   83995XX   steel for low S/Ns , chrome case for the following ;

               4.  8400XXX   /   841XXXX   chrome plated case . 

NOTE  .  Batches and ranges are purely indicative .