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Object Name Micrometer
Catalog Number 2014.23.01
Description 24" vernier, overall length 30", in wooden case 31.5" L. Tumico impressed on top of the wooden case. Metal tag on top of the wooden case that says "Property of the USAF." Label in the middle of the top of the wooden case that says "Vernier 24" Caliper." Black metal tag on the inside of the wooden case that says "Tubular Micrometer Co. Tumico St. James, Minn. U.S.A. Two metal plates on the side of the wooden case that says "Venier 24" and the second says "24" Vernier Caliper." "Tumico" is engraved at the tail end of the caliper.
Source Vogel, Cathy