Congrats. I was watching that and the other couple of rusty items ;-)
The strip of steel on the shaft with the knobs if for fingers to grip.
I say this because the Tabar I have here points to these ergonomics by the direction the head is mounts and when swung hard you can feel it at work.
The Decoartion I have seen called Turkish, Persian and Indo Persian. Exactly...well who knows
but I have seen similar designs on clothing....in particular one loose parallel is the similar style of design on Dr Landsells pants being part of the Khokland armour presented by the Emir of Bokhara....