the blade is original. not a sabre blade..
it is a typical Persian qama. as to rude decoration.. all things caucacus were the rage in iran for quite some time and iran has a large population of caucascan peoples that inhabit most of the country... georgians.. circassians. ect ect. in some regions they still form notable populations today.
the scarf welding in the tang indicates some age as its unlikely post ww2 this would be bothered with due to the sharp decreace in the cost of steel. pre WW2 persians already were importing penknife blades and blanks from sheffield and english made steel strips and bars were sold in every village so scarf welding was probably on the way out by then already.
cracks on the edge can be from a bad quench.. can be from poor tempering and somebody hitting the blades flat with something hard ... could have been present at the time of making due to poor forging.. to cold normally... or ffom inclusionsin native made steel.. . and became visable after the blade was flexed.
on any account its a very typical qama from iran than can be even purchased.. exactly the same.. today for smallish amount from any knife makers shop or knife seller.. there is hundreds of small workshops making these and also pocketknives.
the handles are normally buffalo horn but also now orange.. yellow, brown and cream coloured synthetic materials.. delrin and phenolic are also popular..
these have been popular pilgrimage souvenirs in iran atleast for 250 years and people buy them as gifts... unlike the weapons in the caucasus that only began to be tourist baubles after ww2 weapon laws were passed in the ussr. ive seen quite afew poorly decorated 19th century ones from iran with functional blades.. in iran today even the worst qama will have nice fullering though.
zanjan is a major e centre of production of these. see example below
https://zanjanhome.ir/%D8%AA%D9%88%D...C%D8%A7%D9%86/