Precision 4-Sided Machinist Straight Edge 200mm / 7.87" Vintage USSR

Description

Vintage USSR Precision 4-Sided Machinist Straight Edge 200mm / 7.87"
New old stock
Straight-line verification is designed to test flat surfaces
using light slits - the light, directly determined by eye.
Permissible deviation from straightness  - 0,0016 mm
Dimensions - 200 mm/ 7,87"
Material- instrumental alloyed steel.
Equipped with a handle with insulating plates.
Precision 4-Sided Machinist Straight Edge 200mm / 7.87 "Manufactured in the Chelyabinsk Tool Factory in 1976. This Precision 4-Sided Machinist Straight Edge has the highest accuracy class 0
Precision 4-Sided Machinist Straight is sold in oiled paper in the original plastic case.
In the photo, you can see the three sides of this Machinist Straight Edge.
God bless you !