Elgin boats were sold back in the 50's and 60's by Sears and maybe into the early '70s. They were manufactured by different companies for Sears. Google Sears Elgin boats and you might find some old catalog pages that show different Elgin boats. I would guess that it is a '50s vintage because later on Sears used a model number with a three number prefix code that would show the maker if you knew the code. Such as XXX-123456 where the X's would the the makers code.