CASE  .  Chrome plated, 34 mm .

BACK  .  Screw,  steel

There are three caseback styles :

–  with S/N only ;

–  with S/N , “ Stahlboden “ and “ Wasserdicht “ in the center ;

–  with S/N , “ Rostfrei “ and “ Stahlboden “ in the center . On the board , circularly , “ Wasserdicht “, “ Antimagnetisch “,

             and “ Stossgesichter “ .

MOVEMENT  .   Two types :

–  AS 1130;

–  PRECIMAX  P300 .

    Both report, in addition of the fitted “ Cal “ number , the brand’s name .

CASEBACK MARKINGS:  D. H.  only .

–  on type 1 back , letters and numbers are uniform ( 2mm ) ;

–  on type 2 back , it can be uniform ( 1mm ) or numbers larger (1,5 mm) tahn numbers  (1 mm );

–  on type 3 back , letters are larger (1,5 mm) than numbers (1mm) .

 S/N  .  4  or  5 digits .

           The number of registered watches is significant ( 179 ). It is assumed that batches could be  six :

–  4 digits  :   11XX  /  81XX      fitted with AS ;

–  5 digits  :  107XX  /  217XX   fitted with AS ;

–  5 digits  :  221XX  /  267XX   fitted with AS or P300 ; 

–  5 digits  :  292XX  /  324XX   fitted with P300 ;

–  5 digits  :  331XX  /  398XX   fitted with P300 ,

–  5 digits  :  403XX  /  443XX   fitted with P300 .

NOTE  .

1. Considering the number of Helios available on the market , this brand can

               be considered the largest supplier of D.H. watches at the 3rd Reich .

2. Always considering the number of watches , there may be descrepancies

               between S/N and batches .

               It is recalled that batches and S/Ns are purely indicative .

HELIOS  AS 1130

HELIOS P300