Our Old Town records only go through serial number 210999, which dates to 1975. You might get information on your canoe from Old Town. Someone else here may be able to venture a guess as to the year, though.
If you use the "search" function above and type in "Molitor", you should find some interesting information. I haven't finished the article I've been working on for Wooden Canoe, but eventually there'll be a story on the Molitor, which has an interesting history.
More information on the Old Town Company can be found in Sue Audette's book, Old Town, Our First Hundred Years, which is available through the WCHA store and most booksellers, eBay, Amazon, and public libraries.
Kathy