03-16-2012, 04:23 PM
General makes a 12 inch ruler marked for 85 HO scale feet with an extra scale foot before 0 and after 85 for a total of 87 scale feet. It also has N,S and O scale, plus 5 inches marked in 64ths, and a decimal equivalents for number drills and reference table for tap drill sizes for small screws. plus 0 to 100 mm.
Robert
Modeling the Canadian National prairie region in 1959.
Modeling the Canadian National prairie region in 1959.