Nice console, looks like a Sitral B to me without seeing it on location, I would say it was build after 1975, the knobs and faders are post 75, the frame however is a Sitral A series.
Do you know if you have the VCA controlled faders with build in limiter? That is a good indicator to get a general idea...
If you need documentations on the modules, please let me know, I have the entire Siemens Sitral blueprints with all revision on the modules. Plus several boxes of NOS replacement parts like x-former, etc...
There must be a fascinating story with that console, were it came from etc, wana share?
I attached a pic of the last Sitral C, 20 into 4 (stereo) into two made in 84 as a reference on Sitral history..... Currently sitting in my storage room doing nothing...
Most Beatles movie sound were mixed on Klangfilm Sitral A consoles, I have somewhere some Siemens advertising from the time period...