Two hid tags on old sears aluminum canoe help!!!!!

New to the forum so thanks in advance … I have had a old aluminum sears 17’ laying around for a couple years and just decided to get it out and take it out … i replaced the seat webbings and it’s ready to go just looking for some more information… so it has two hid plates with two different serial numbers as well as model numbers oldest registration sticker on it is from 1973 any help will be greatly appreciated