I've recently come across with a 105.012 Speedmaster with the A.C.P inscription on the dial: After doing some research I found out these watches were made for the Automovil Club Peruano (hence the ACP signature) in the 60's, everything on the watch seems to check out but I have my reservations regarding the bezel, I think it could be a service bezel from a later period due to the position of the dot next to the 90 and the font used on the bezel: Since there doesn't seem to be anything set in stone when it comes to this particular model I would love to hear your opinion on the matter.
Looks legit to me, but I'm not expert on these rare birds. Bezel is modern. MWO, second edition, page 480. 50 watches produced. Should not have Ts at Swiss Made. Legit ACP watches should be within 20,520,740 and 20,520,839. Fewer than 10 found so far. All the credit and tremendous thanks to the MWO crew for such awesome info.
If it's in the number range that oddboy quoted,your one lucky son of a gun. Great find,tell us how and when you bought it.
If all checks out, then you have a realy realy rare and valuable watch at your hands! I've only seen one for sale the last 4 years, from a private party in Italy. Congratulations on the watch!
Good catch! That would be def. be wrong. I need a second coffee.... it's to early for me. @OP here is some more info on the ACP's https://www.fratellowatches.com/omega-speedmaster-a-c-p-ref-105-012/