This format of Hull Identification Number was used from November
1972 to August 1984. It shows the Manufacturer Identification
Number, the Hull Serial Number and the model year code.
CLY: Caillou Boats, 4 Edgewater Place, Winchester, Mass
27206: Hull Serial Number
M79D: November, 1979
-279: Suffix relevant only to this manufacturer and not part of
the formal HIN.