Help ID this VERY EARLY Winchester pocket knife...with key?

[Knife Trading Post]

This is an oldie. Two blades on one side and a key on the other? The key tool doesnt look to be home cut as the backside of it is rounded. Celluloid handles.

Tang stamps: "Winchester Trademark Made in USA", either "300" or "3000", "Pat'd 4/7/06"

Ive never seen one of these.

Any input on this one is appreciated.

[btrwtr]

It's a cattle knife with a punch blade.

[Knife Trading Post]

It's a cattle knife with a punch blade.

Thats it. Thank you sir.

[ea42]

That's a Napanoch punch so definitely early as I don't believe they used that punch for the entirety of their existence. I could be wrong though so don't take that as gospel.

Eric

[msteele6]

They definitely did not use that punch for long, most of the early Winchesters were made by Walden and they used a different punch. So, early 1920's. Incidentally, most of these cattle knives had a picture of a steer's head on one side, you often see them marked as Keen Kutters and Winchesters, but rarely with the Napanoch punch.

[OLDE CUTLER]

Could have looked like this when new??

[FRJ]

With sunken joints, I might add.