Did you ever find out more information about your kayak?
I just found one similar in someone’s yard here on Salt Spring Island in British Columbia. It’s Frontier Fiberglass Produces kayak dating from 1976. Frontier Fiberglass are known for their canoes but they also made a few kayaks. They were based on the unfortunately named “Eskie” design imported from Germany. There’s a biography of the company’s founder floating around on the interweb somewhere that describes how he came to Canada from Germany and started a small boat-building business outside New Westminster, BC.
I’m in the midst of restoring my boat. I’m going to steam-off the big gold “Frontier Fiberglass” sticker so I can put it back on when I’m done patching and painting. Might paint it to look like the vintage Fisher-Price kayak which was apparently also based on the same boat.
How do you like yours? It’s not as kitted-out as contemporary kayaks but I find it to be really maneuverable and stable.