CASE  :  Chrome plated,  34 mm .

BACK  :  Screw,  steel .

Outside: the S/N only  Inside: “ Boden-Edelsthal “ 

MOVEMENT  :  AS 1130  no name

CASEBACK MARKINGS:  D.H.  only 

Letters and numbers are small ( 1 mm ).

S/N  :  3  or 4 digits . 

From the watches recorded ( 33 ) only few have 3 digits ( 3XX and 9XX ) . All the rest have 4 digits and the range could be 

  11 XX  /  61XX .

NOTE  : S/Ns are purely indicative .