11 Ott RECTA D. H.
CASE . Chrome plated, 34 mm .
BACK : Screw, steel .
Outside it shows the S/N only
Inside, on watches with a low S/N , very often the initials are “CB” punched .
For those with high S/N a number is punched .
MOVEMENT . Recta 1320 customized .
CASEBACK MARKINGS: D. H. only .
Indicatively, up to serial 594XXX punching is uniform and larger ( 2mm) then, still
uniform, became smaller (1mm) .
S/N . 6 digits . From the registered watches (41) there may be three batches :
1. 552XXX / 561XXX ;
2. 582XXX / 598XXX ( the most numerous) ;
3. 634XXX / 636XXX ( the smaller)
NOTE . Batches and ranges are purely indicative .