My '72 Seafari had/has the inter-connected dark blue and light blue SC logo with the word SeaCraft in black letters about 6" inches high or so for the capital letters. Unlike the 1st photo below, mine does not have a reverse shadow effect to the lettering.
Looks just like the ones on the side of Jim Eagleton's 20' Sceptre and Botapeje's old Seafari, both shown below.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury