I'm far from an expert too, you could be right Mitch. Their serial numbers were puzzling. I had a Kodiak Magnum with a K(they started using the K in 1970)U serial number with a recessed coin, it was identified by some of the collectors as a '71. The coins were recessed until late '71 IIRC and raised afterwards. Here's a KR serial number with a raised coin...as I said....puzzling.