A little technology
Repair is a profession...
It's also a passion
FOCA
Very specific mechanisms
Foca is a French brand whose manufacturing lasted 20 years, from 1945 to 1965.
The producing company was: Optique et precision de Levallois (OPL).
These devices have very particular mechanics, exclusive to this brand.
Disassembly requires specific OPL / Foca tools used in the workshop.
The 100% French brand
Focus on the mechanisms… How does it work?
The Foca mechanisms are very different from other brands.
It is a typically French design.
A little more complex, repair and maintenance is not always easy.
Cords instead of the usual ribbons, curtains with a particular cutout, a double cam shutter mechanism, a massive rotating rangefinder, etc. etc.
Of course, new parts are impossible to find and recovery from a “donor” is no guarantee that they are not also very used.
Detailed explanations of how this mechanism works require many lines and there are already enough here.
Observing the videos already gives a lot of information…
I decline all responsibility if you damage your toys!!! There are professionals to do this work !