Hi Guys, for those who are not Italian a brief explanation:
A.M.I. is the the Italian Air Force denomination since the end of the war (1945) it stands for Aeronautica Militare Italiana
R.A.M.I. is the Royal Italian Air force, denomination of the air force between 1927 and 1945 , Italy was still a monarchy back then, It stands for Regia Aeronautica Militare Italiana. The R.A.M.I model is most likely an Universal Geneve whioch used to provide these watches to Cairelli, the UG was anyhow provided with the same Zenith Movement
P.S is the Italian State Police, P.S stands for Polizia di Stato
Cairelli was a watch maker in Rome who customized the watches fro the Italian Air Force for over 40 years
I hope I added a bit of interesting info
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