sail #

Bought a "well-used" Laser, with serial number: ZFS5375790576 ... others have ID'd "ZFS" as Les Voiliers Performance Inc. of Pointe Claire QC Don't know the sail #, or the date of manufacture - assuming it's May of 1976? The '0' next to the 5 is a 0, not a 'D' as best as I can make it out...