Re: What company made this jon boat?
Welcome to iboats.
Nope that is a serial number.
Hull Identification Numbers (HIN) did not become standard until the early 70's and all the manufacturers were on-board by 1974. A HIN will begin with three letters.
You can basically call it almost anything in your case...... alumacraft, duracraft, lund, starcraft, sears, wards etc