Congrats on the nice "catch". And yes this is in the correct narrow range seen on a handful of 14755-61 FAP marked caseback's.
I don't doubt the originality with that serial and the provenance you got from the family, but I'm just a little puzzled about a minor detail. The FAP engraving. Just a quirky thing here to geek about
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My observations on the FAP casebacks shows some different types and location of the FAP engraving:
On the early FAP's (2913-3's) the engraving is small and with flat top A and located below the top rim of the caseback.
On the late FAP's (2913-7's and a few -8's) the engraving is large and with pointed A and located below the top rim of the caseback.
On 14755's, I have only seen FAP casebacks on the -61 subreference, all had a new type of engraving, small and narrow almost pointed A and located above the top rim of the caseback (the 14755 casebacks are different than the 2913s because of movement height - cal. 55x vs. 50x).
@watchknut s has the large type of engraving seen on the laste 2913's with pointed A, but with location
above the top rim of the caseback...
Well, quirky indeed...and falls outside what I have seen on these. But again, the SM300 FAPs are a bit of a mystery overall. My observations leads me to think there were 3 "major" batches produced within about 2 years from eachother. The first (2913-3's) in 1959, the second (2913-7/8's) in 1961 and the third (14755-61s) in 1963. The lollipop second hand was meant for the first two batches IMO and often seen on these, but rarely seen on the third batch (production/stock had seized).
It will be very interesting to see if the extract will state delivery to the FAP in the comments or "just" to Peru. The more recently seen extract only states Peru, but perhaps Omega also have changed policy on these, like the UK MoD ones, where Omega now have begun to mention the military provenance in the comments and not just delivery to the UK.
Geek time out...enjoy
