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A330driver yes that's a Stevens 44 1/2 extractor

They are pretty simple and rough looking.
But when the breech block reaches the bottom on opening it pivots slightly and the extractor is cammed...

Specs courtesy of the Winchester marketing department.
Sounds familiar
It's still happening

Ah there was a 25 Rimfire long long before

Stevens did a few different 25 centerfires
25-25
25-21

Lots of small 25s to shoot only to 100 yards or in a gallery

But the small bore black...

225 Winchester was an attempt to compete with the 220 Swift
But the Wildcat 22-250 became a factory round at much the same time and the 225 died

Brass can be made from 30-30

It's a 225 Winchester barrel and it was for Tentman but the world tipped on its ear with the CHCH shooting if I recall