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Machine divided steel rule 12" long (flexible)

Machine divided steel rule 12" long (flexible)

Machine divided jointed steel rule 12" long number 1301 mounted on common board with /1

Machine divided jointed steel rule 12" long number 1301 mounted on common board with /1

Machine divided steel rule 12" long pattern

Machine divided steel rule 12" long pattern

circa 1918
A steel rule demonstrating how a diameter measurement could be taken using a rule and caliper (/1 Pt1)

Steel rule, for rule and caliper type measurement

N. K.
Steel rule, Great Western Railway, marked 2 to 8 inches, ‘G.W.R. 3.09’, produced on the Fairburn & Co. linear dividing engine as an example of work, recovered from British Rail Engineering Ltd., Swindon.

steel rule made on linear dividing engine

1863
Steel rule, 1 foot

Steel rule

1901-2000
Flexible steel rule used in antenatal practice, 24 inches (60cm) long, thought to be English, 1920 - 1940

Flexible steel rule used in antenatal practice,