The 1920 is basically a Mauser action, with front locking lugs on the bolt and shortened to fit the Savage rimless cartridges. Overly simplified, but that's it in a nut shell.
The 40/45 is an entirely different beast. Rear locking lugs in a tubular receiver, with a detachable magazine. Not at all like a Mauser.
Most will say the 1920 was a superior design, me included. But both serve their owners well.
Both have been extinct since before WWII. You decide if they are collectible or not. With 99's, rarity and condition drive the collector's market. Ditto 1920's and 40/45's. We shooters use different guidelines, sorta.
Last edited by gnoahhh; 07/27/16.
