Kindjal help needed

[Rivkin]

Dear All,

Here is my newest stuff - kindjal.
Attached - overall view, lamination lines at the tip, straight lines (what is it ??) at the base, maker's marks.

Can please someone help me with what kind of lamination/steel work it is ?
Maker's mark I think reads "Amale Shda" - made by Shda ? Oh, those who know arabic please correct me !

Should I experiment with vinegar or FeCl on this one, or the pattern is already well seen.

I also think it's really close to Astvatsaturjan page 355, on the bottom, third from the left (Transcaucasian marks).

It's unusually big (which votes for Transcaucasian origin), however it's two screws rather than 3 screws mount, and extremely unusual hilt for a Georgian kindjal (one part, lightly colored wood). Looks like an old shape.

I feel fantastic about this kindjal - it's heavy, 3 pounds, but it's so greatly balanced it moves very quickly, the only thing that gives away it's weight is that you feel tired after swinging it for a prolonged time.