I can tell you that I was given one for X-mass around 1972 or 73. It is a copy of the Marlin / Glenfield Model 49 rifle. You can find the parts at http://www.e-gunparts.com/
They also have an exploded diagram of that rifle for parts number reference. The value I don't know but the rifle is simular to the Marlin mod 60. It holds 14 or 16 rounds off 22LR. I just fill it up to the loading port on the tube magazin.