no import marks on this one. It's an all FN gun...not a parts kit build. imported by browning starting in 59. a little over 1,800 were imported like this

One resource you could use is a book or website that lists FN-FAL serial number ranges and corresponding manufacturing dates. Some examples of books that might be helpful are "The FN-FAL Rifle" by Blake Stevens or "The World's Assault Rifles" by Gary Paul Johnston and Thomas B. Nelson.

Alternatively, you could contact FN Herstal, the manufacturer of the FN-FAL, and provide them with the serial number. They may be able to provide you with information about when the rifle was manufactured.