Looking for some info on a Mohawk Canoe

I bought a 16 foot Mohawk canoe today for $25 and I am wondering if any one can tell me any thing about it and it’s age.
The letters and numbers on the metal tag read "MMN83031D1
It looks like Roylex and I am guessing the weight to be around 50 pounds. It needs a good cleaning, a center thwart and some G-Flex work and it also does not have any flotation.

If it is Royalex the ABS core is flotation
For river use you will want more but as is it ought not to sink
No help on the model from here

Does not have a picture either.