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    Re: Plath certificate: drop of solder
    From: Terry Syrokosz
    Date: 2021 Feb 6, 00:12 -0800

    "don't serial numbers usually begin with a two-digit representation of the year of manufacture? vintage 1957 then?"

    Not as far as I can tell. The ones I've tracked so far are below.     I think David Pike may have nailed it with the tin in the solder. Copper without tin does not last in a marine environment (wish the last owner of my boat knew that).

    If I ever do get that light to stay working I'll be happy to let everyone know!!!

                                                                                             

    serial number         year

    50133                    1967

    32978                    1953

    62669                    1981

    53446                    1970

    48332                    1966

    58833                    1974           There does seem to be a pattern here. So probably early 70's

       
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