Vintage GIBSON 1930s (Kalamazoo K21?) Archtop Unique GIBSON LOGO Archtop Guitar

Description

Up for Sale is a very RARE vintage 30s Gibson Archtop with a very unique and RARE Logo.
Here's what I know:
Unable to find any info about this, but I had the guitar looked at by a locally renowned Luthier Paul Mehl, He's never seen this logo anywhere and says it very rare indeed! He set it up and did a heated neck reset and fixed a few cracks in the body. He stated the bracing is a unique bracing which only Gibson used. Also he verified that the Logo is original to the guitar and have never been altered. He reccomended putting it on ebay and start it high and the experts will let you know exactly what you have.
It appears to be a Kalamazoo head stock which he believes someone at the factory made this for themselves and took home possibly.  Its all orignal Gibson with the exception of the Headstock and he replaced the bridge with a period correct bridge and tuners and screws. Also last two frets up top towards the body were added as they didnt have any when i got it. He is also making me a pick guard.
Plays beautiful very low action and neck is straight as an arrow.
Let me know what you all think.
Specs:
Back and sides are Maple, Top is a Solid Spruce Top, Fretboard is Rosewood (possibly Brazillian), X-Bracing appears to be that of a period Kalamazoo kind of X-Bracing with unique square braces.
If anyone has any insight please message me!