link below provides details on reading your M-boat's Hull Identification Number - http://msog.org/specs/hin17.cfm the numbering of the boats wasn't perfect ... i owned one of two M15s with hull/sail number #288. :: Dave Scobie ________________________________ From: stevetrapp <stevetrapp@q.com> Sent: Thursday, June 20, 2013 4:41 PM Henry, 1985, but by the time it was shipped to the dealer and I persuaded my credit union to finace it, the title and registration indicate 1986. Look at the last 2 digits of the hull serial number, located in the upper righthand corner of the transom, those digits indicate the year of manufacture. Also, the sail numbers of the early Montgomery boats indicate the sequence of building, mine was the 335th that Jerry built. Steve M-15 # 335 P.S. right Jerry?