[G.T.]

Hi Don, fxo & 122 are the code markings on German military magazines fabricated by the Haneal firm during WW2, they were used in Mauser military P.08's from 1939 through 1942, at which time, saw the end of P.08 production. The mag's of this type incorporate a number of improvements over the folded sheet steel mag. that was used prior to the Haneal mag's devolopement. The main improvement of the Haneal type mag. over the folded mag. is a robust one piece tube, rather then the two sheet metal halves joined with a folded seam....also a formed spring was used instead of a coil spring, which gave added support to the follower, these 122 & fxo mag's are high quality mag's and it is no surprise that they functioned well in your Luger...$65 dollars for one is also a bargain......They can still be found in excellent condition, and are coveted by the shooter and collector alike......you can also find them with a black plastic bottom instead of aluminum, but they are far more fragile and should not be used if the bottom is in good shape! Hope this helps! Till...later...G.T.