fxo mag

[G.T.]

They are excellent mag's for your lugers! I'm not very familiar with the 42 marked mag? It would depend on how, and where on the bottom, the 42 is stamped! Bill M could probably give you a better assessment on that type of mark! The black plastic mag seems to be prefered by collectors that want to match them up with byf 41's & byf 42's with black plastic grips! But they are a correct and highly desired mag, in excellent unbroken condition! till....later....G.T.