Alf,
I am sorry to have added to your confusion. The flat-button magazine is required for the very early 1900 frames that have no groove or â??reliefâ? for the magazine follower button. The flat button was threaded and screwed into the magazine follower. The buttons tended to work loose and either made it difficult to put the magazine in the gun or the button could come out and be lost. It was also very difficult to depress this small thin button to load the magazine. To overcome these problems, a raised follower button was designed to make loading easier and, rather than being threaded, the button was an interference fit into the follower and further secured by â??stakingâ? (expanding the button stud like a rivet) through a hole in the opposite side of the magazine. This new design button was also easier to use with the loading tool. Many of the early frames were re-machined, or â??relievedâ?, to allow use of this new type magazine, so an early Luger with an un-relieved frame is somewhat rare.
