I am also looking for one, it will have " Commanche " on it. I have been looking for one for my 1964 sp1 for a year or 2, good luck. I do have a photo copy of the manual.
Look on the back cover - it may have the printing date there somewhere.
God and the Soldier, we adore, In time of danger, not before. The danger passed and all things righted, God is forgotten and the Soldier slighted. ~Rudyard Kipling
I have the "commanche" marked one and there is no printing date. The back cover is bare. There is an exploded parts diagram dated 5/64 so it MUST have been printed after then.