Hi vintage,

I couldn't tell you. Mine was made in mid 1914 but it doesnt mean that the takedown feature wasn't added later. The mag plug makes it impossible for any "takedown" to happen. I would love to machine the plug to get the pin back in there but that will be for a later mod. Anyway in war why would you need a takedown feature? Maybe easier to clean. Ah just another thing to add to the list! I abhore not having having a list and so does my wife . Anyway you were supposed to ask me how long it took to polish down my concrete floor! No about my gun!