Thanks, that helps a lot! I'll look around the transom and inside the hull for any hidden tagsIf it only has a 6 digit serial number and no standard 12-character HIN or Hull Identification Number, its most likely pre-1972 when HINs became mandatory in the US. Anyway, someone should recognize the model or logo from some members and enthusiasts here. Also check the transom or inside the hull for any hidden tags or plaques that could give more clues.