ULTRA PRECISION PARALLEL INSPECTION VISE, New Old Stock

Description

New precision inspection vise made by Grinding Technology Inc. This vise was made 40 years ago for a gauge lab and never used. It measures 4.5 long, 2.5 wide, 2. tall, the jaw travel is approximately 1.5 inches. The inspection report is included, I believe the tolerance listed is in millionths, I have no way to verify them.
I didn't take it out of the bag because it has been oiled and I don't want to expose it to the air. The vise is magnetic and has a small groove down both sides for clamping, the groove is 1/16 deep 1/8 wide.
Any questions please ask. I have two and don't know if they are a matched set, You are buying one.