Seacraft hull ID number question

[ScottM]

I wonder where mine came from?
NJZ Are the first three. It ends in 86, but my title says it is a 1970.

Any ideas?

In Mass., when the state assigns a HIN to a boat that doesn't have one, it starts with MSZ. Based on this rationale, it appears as if New Jersey assigned your boat's HIN. I would check with the registration/titling agency in your state to see if my hunch is correct.