12 Ott TSILLA D. U.
CASE Chrome plated, 34 mm .
BACK Screw, steel
In addition to the S/N shows “wasserdicht” and “stahlboden” .
MOVEMENT . AS 1130, no-name .
CASEBACK MARKINGS: D. U. only .
Letters are larger (2mm) than numbers (1mm) .
S/N . The small number of registered watches (2) does not allow to define a range .