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10.5''', Dm= 23.55mm, Do= 23.8mm
f = 18000 A/h
1.50 x 0.80 / 0.21mm
Comments about the data
ratchet on dial side, crown mechanism with rocker bar
option: ratchet wheel on back side (example, likely indicated by the suffix M)
Watches of the brand Aretta, belonging to La Clessidra di Francesco Marinsek, Triest (IT), have mostly Lorsa or Sefea movements, but occasionally also the movement shown here. As this movement is not listed in common registers, and is only met in Aretta watches, it is listed here as Aretta 23-50M.
Example, year: signature; shock device
ca. 1950: 23-50, M
Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.
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