This is a really nice example of a 1950's era Micro hardness Tester kit in excellent condition and the diamond is in excellent condition. The set is complete and hard to find in this condition. All the dials turn smoothly and the unit appears to have been used very little in it's time. The storage box is also in excellent condition. The Diamond Indenter still has a very sharp point and appears to be in excellent shape which is often not the case with something this old. I looked at the diamond Indenter with a microscope.