Fran.. your screwed i.. It's a UFO... Really it probably is the same plate on all the "breakaway" mirrors of the early 70's (like on my '73 Spider) The mirror might be for a MONTREAL but the grounding of it is probably the same.pieces as a lowly Spider because the Safety police had to test them to get into this country and they wouldn't want to test a myriad of break away designs .. I don't think.. .. Take some pics and post .. APE probably will have it here Monday.