Unknown hatchet maker - Invincible?

[Scrubber]

I removed the rust from a very crusty and neglected hatchet and found something unexpected underneath.

The stamp reads Invincible, there are no other markings.

I cannot find anything about this manufacturer on the internet, not even a single tool.

The hatchet might be old, I got an antique tool along with it.

Has anyone heard of this company?

[Papaw]

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[Bill Houghton]

Can't help, but that's a nice pattern - probably rigger's or half, depending on weight, but with a narrower blade (that is, shorter cutting edge) than most I've seen.  Although it could also be a shingling or lathing hatchet in a heavier-than-common pattern.  I bet it's good in the hand.