Re: looking to date my Alcort Sailfish
This won't help you, but for owners of "newer" Sunfish... they have the S/N cast into the transom of the fiberglas. Last two digits are the year of manufacture, with a letter following that indicates month:
AMF = Manufacturer
12345 = mfg number ( coding unknown )
M = USCG id style identifier
73 = Model Year
A = Month built
My S/N = AMFXXXXXM81D = April 1981.