11 Ott BULLA D.H.
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 .