Well I wish is was as simple as it seemed it would be. This Hull # is 558738. No letters anywhere. I talked to the Idaho Stae Police, The Idaho River Patrol, and the Oregon Marine Board. No body knew anything, But Oregon said no problem regestering it as either home made or Maker Not Known. Either way will work at no extra cost. I just can't find out who made it. The top looks like a Duckworth, but that is all I can identify. It is very heavy Welded Aluminum, and I have compared it to many of the makers I know, with no luck. I may just stay away from it, as It only has 2 front seats, and all the guages have been taken out. It had a radio and a speedometer in it.