Search:

Now THAT makes sense, hatzicho !

Not your typical 'Fuller' I would guess.
A great deal could be found as laying this on a hone and checking to see if it lies on the top, or bottom spine.
OR both simultaneously. Were it the...

Looks as it would be a fairly stiff grind. With the stabilizer on the lower part of the blade, the top above the groove seems to be stiffness and weight.
Pretty unusual...