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    Re: Sextant certificate with a graph
    From: David Pike
    Date: 2020 Aug 16, 12:06 -0700

    A couple of questions:
    1.  Why would anyone wish to redact the sextant pattern and number from the certificate, unless they didn’t match the sextant in the box.
    2.  What did S I R S stand for? Sextant Instrument Repair Shop possibly.

    I did find a better photo from 1981, https://www.catawiki.com/l/16820367-sextant-pattern-491-hughes-and-son-london-circa-1950  so it’s the way the ACO must have been doing things around that time.  I visited them in January 80 or 81 to swap a Watts Datum Compass; they had to be delivered by hand.  It seemed very interesting in the Compass Dept, but I never thought to ask to look at the Sextant Dept. DaveP

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