Hi Stig,
Disappointing that I've posted an already seen photo. But thanks for the heads up anyway.
Now as you'll recall I have been underwhelmed by Aeronaut's Italian Aviation in the First World War,but it does have a small piece on the M.12. One photo which can also be seen on the net
https://www.mediastorehouse.co.uk/ma...t-9888805.html
I would say that it has a serial number before the M.12,but I cant read it.
Davila has gone with no more than one or two examples ordered by the RM and also references the civilian M.12 bis with an enclosed cabin for three.
I fear this doesn't really add much to what you already know. We really need an Italian expert.
Regards,
Clint