There were many early manufacturers of chisels RHD45. The nomenclature depends on where you stem your training from. And where your teacher stemmed their's from. Shipwright, sashmaker, carpenter, lutier?.
Before I placed an order somewhere, I would go to a flea market and buy a bucket of junk chisles. I would learn to shape and sharpen them, and then visit a Woodcraft, or other woodworking store on a saturday morning and meet the chisel devotees.
It is the same amount of work to transform a $1000.00 blank into sawdust as it is a $25.00 piece of walnut. YMMV
