I’m actually in the midst of restoring a very similar canoe, it’s an Allagash as well. The RVF / Riverside is tied to the allagash canoe company which from what I’ve found from other forums was bought out by Stowe in the mid 80’s.
I’m assuming mine was from ‘83, has a non conforming HIN RVFN3G050D83. It’s a 13’ Allagash Guide, fiberglass. Finishing up work on the hull but still need to replace the rotting gunwales.
The “before” picture attached.