I agree with 2-piper. Back in the late 60's early 70's was apprenticing as a machinist with a company called Sweda,were in the process then of making data pen cash registers. All the machinery was set up in mm, all the measuring equipment was in mm, and most of the cutting tools were of Sweedish steel, Sandvik, great stuff to work with. In my opinion I think it was some of the best steel around for machining and hardening. Their cutting tools outlasted most of the others.

David