The blade is forged - the fuller is shallow and the edge of the fuller isn't sharp. The disks are cut from sheet metal, and I think the grip is the same sheet metal rolled into a slightly conical tube. The domed cap looks like it might be a different steel.
The thickness of the spine is about 4mm at 2", 7mm at 6"-7", and 6mm from 12"-18". Positions along blade in inches as per photo. I doubt that it's differentially hardened, since the point is a little bent. Are "real" ones usually differentially hardened?
800g.
I don't have any reason to think it's older than perhaps mid-late 20th century. Could be late 20th.
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