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    Re: Sextant Mirror Resilvering?
    From: Alexandre Eremenko
    Date: 2007 Jul 20, 04:57 -0400

    I believe that the (later production year)
    C. Plath mirrors have the same size as Cassens Plath
    mirrors. If this is so, why not to buy replacement mirrors
    directly from Cassens-Plath?
    On Thu, 19 Jul 2007, mat wrote:
    > I have also been looking for re-silvering service for a while for my
    > old
    > C. Plath mirrors.
    > Finally, I found a local amateur telescope shop in Pleasanton, CA, who
    > were
    > willing to experiment. They put on same reflective coating that they
    > use for
    > telescope mirrors for very reasonable price.
    > Initially it looked pretty good, but the coating turned out not to be
    > durable enough.
    > After mounting and mirror adjustments the reflective layer developed
    > several
    > damaged spots.
    > So I am planning to go for round two next week, and this time cover
    > the back of
    > the mirrors with protective paint before handling them.
    > Does anybody have any suggestions as to what paint or varnish to use?
    > I was thinking about few layer of black enamel spray, simply because I
    > have a
    > can at hand.
    > For replacements you may also try to contact Ridge White at Robert
    > White Instrument company
    > in Boston (800-992-3045). They may be able to provide you with a
    > replacement mirrors,
    > though last time that I talked to them they said they had lost their
    > silvering contractor.
    > Martin
    > On Jul 17, 10:56 am, Ike Stewart - shell acct 
    > wrote:
    > > Can anyone recomend a source for a replacement mirror for a Freiberger
    > > Trommelsextant (Drum Sextant) in the U.S.?  If not where do you recomend
    > > for resilvering?  I used Texas Nautical Supply/Land Sea and Sky a year or
    > > two ago, and while the service was very fast the quality of the silvering
    > > was a bit less than I expected.
    > >
    > > Ike
    > >
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