(1) CALIPER / Circular Scale
Have a look at a NONIUS Version
T E C H N I C A L D A T A of the M I T U T O Y O C A L I P E R
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Range 150 mm ; Unit 0.01 mm Model 505-660-50 / 5M 1953 / M.N.84
MITUTOYO Mfg.Co.Ltd., Tokyo / Japan (1950)
REM.: Advantage of a ZERO-ADJUSTABLE SCALE: +/- Tolerance Proofs ...
(2) SPECIAL CALIPER
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T E C H N I C A L D A T A of the H E M A C A L I P E R
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Range 10 mm ; Unit 0.1 mm HEMA / USA (1970)