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    Seeking advice for bubble repair on a Plath aircraft octant
    From: Werner Luehmann
    Date: 2009 Apr 3, 09:47 -0700

    I just aquired a generally well preserved Plath-DeTeWe aircraft octant
    (assume built in 1942 since the ) including all accessories and the
    box. Since the octant has nearly no wear outside - execpt the area at
    clock winding house - and it carries no acceptance stamp on the plate
    attached to the altitude disc as well as no index correction stamped
    on the same plate, I assume it has never been finally delivered to the
    air force. This type was the standard German air force octant
    (sextant) during WW2, type ("Ger�t") 127-134-B-1 or also known as a
    SOLD type. Beside some other small flaws (due to tampering I assume)
    the bubble chamber is nearly dry (no bubble possible, only traces of
    fgluid visible).
    Has anybody done a repair (i. e. filling) of the bubble chamber and
    can give me some advice? If so, what fluid was used or should be used?
    Might compass fluid work (I used it in a Link A-12 with good success
    since I could not locate a source for Xylene here in Germany)?
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