Welcome to tfl!
Nice looking flintlock!
the mag is broken, the body is in more pieces than it should be, this looks like a replacement part as it is made from cast Aluminum not Brass,it was like this when brought
Ok, this has me curious. From the sound of things, the magazine has already been taken apart? (If so, disregard all warnings about not doing that
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A picture of the rifle and the broken parts (or just the magazine parts) would be VERY helpful.
We need to be careful, to avoid confusion due to different terms. I understand you aren't familiar with the terms as we use them. Not a problem as long as we can both figure out what is meant.
The "body" of a magazine is the outer shell that holds the internal parts. In the rotary magazine Savage 99 the magazine "body" is the receiver itself. (and, to be clear, we are not talking about a detachable magazine, correct?)
So it sounds like the inner part, the "spindle" shaped part that moves the cartridges is the broken part. Is this correct? (that part is often called a rotor or a carrier, I need to do a little research to find the correct name as used by the factory/parts suppliers, and should know later today...)
Anyway, Early Savages used brass, later ones, steel (visible in the cartridge counter hole, when the rifle is assembled). Never heard of an aluminium one. Aluminum, in a 1901 rifle would be highly unusual.
I will check with my Savage expert when he gets home from work tonight, but an aluminum part strongly suggests it is not original.
I did take a look at the Numrich arms web site (Gun Parts Corp), and they only ship to the US and Canada, so that might be a small problem getting the part to you in England (if they have the part)...
I'll do some research, and get back to you when I have more information. Quite possible someone else will post the answer before I do, there are many more expert in the Savage 99 than I am.