Do you have one in your collection?

If so, would you mind telling me the date of manufacture, which is stamped on the butt - month followed by year? E.g. 10.52 for October 1952.

I'm trying to narrow down the date when the 49a became the 310.

Some sources state 1968/69, whilst 1964 has also been suggested.

Many thanks as always and a Happy New Year to all

John