A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
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
58833 1974 There does seem to be a pattern here. So probably early 70's