i love my Omega's and my seamaster/speedmaster in particular. i did have 3, but all later than yours as i collect from 1964. i now only have 2 as the refurbed one got passed onto someone else.
i would hazard a guess that this watch was intended for issue as it is stated as being a 'military divers watch'. just a guess, but why else would they write it?

i hope to see much more of you on this forum cristos. its one of the best sources of info for vintage Omega's.
best
Graham