If you want to be absolutely sure, call or email Remington and have them look up your gun's serial number.
He did not like to do paper work so Winchester would do all the patent applications, get the patents in John's name.
There was a action spring inside a tube located inside the buttstock.
The tube was threaded into the rear of the receiver.
There was a fiber cushion riveted into the inner rear of the receiver acting as a breech-block stop.
The barrel utilized an extension protruding into the receiver which the breech-bolt's locking block locked into this extension when for lockup at bolt closure.