Machine divided steel rule 12" long pattern
Machine divided steel rule 12" long pattern, no. 412D mounted on common board with /2, /3 and /4
Four Machine divided steel rules, mounted on common display board board and made by Chesterman 1919 or earlier.
Machine divided steel rule 12" long pattern, no. 412D mounted on common board with /2, /3 and /4
Machine divided steel rule 12" long (flexible), no. 332D. Mounted on common board with / 1, /3 and /4
Machine divided jointed steel rule 12" long, number 633 mounted on common board with /1, / 2, and /4
Machine divided jointed steel rule 12" long number 1301 mounted on common board with /1, / 2 and /3