Help identifying a bayonet

[RufusC_Winkle]

I have this bayonet that was found in a local antique dealer in east Texas.
Please help identifying these markings, as I don't see anything similar anywhere.
Thanks

 

[JOHN42768]

Welcome, enjoy. Sorry, no idea on those markings

 

[Dan Kohli]

Do you know what type of musket it would belong to? Or what is the inside measurement of the socket?
I might just be going down a tangentially related path though.