The 1959 stock was a London Underground train that used to operate on this line it also operated on metropolitan and jubilee back then. This train is a good service and is very old.
I think you will find it was the A60 stock which operated on the Met. But yes a decently done 1959 stock would be brilliant, could also be used on several other tube lines (Northern and Central standing in for the very similar 1962 stock on the latter).