Vintage screw Johanson micrometer 1920’s - MICROTECH - Innovative measuring instruments

Vintage screw Johanson micrometer 1920’s

A 100-year-old Swedish analogue micrometer type МВМ-25 (with two micrometer heads, still without ratchets and interchangeable tips) for measuring threads in 1.0...1.75 mm increments from the "C.E.Johanson" company, which was founded in 1911 

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A 100-year-old Swedish analogue micrometer type МВМ-25 (with two micrometer heads, still without ratchets and interchangeable tips) for measuring threads in 1.0...1.75 mm increments from the "C.E.Johanson" company, which was founded in 1911 by the universally known (in Ukraine known by the name "Johanson") inventor of end length measures who also built a metrology service for Henry Ford plants in the USA from 1923.