Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 201
2040. Transparent Amber Lined, Maple Blade, movable head, with patentclamping swivel and micrometer adjustment. Size, in Inches, 24 30 36 42 48 Each $3.50 $3.70 $4.20 $4.70 $5.50 PARALLEL-RULER ATTACHMENT For use on Drawing Frames, Drawing Boards, and the Blackboard 2045. … Attachments are of brass, highly polished, easily taken apart forcleaning and oiling. Operates easily at any angle of board or table,carrying the ruler blade with a light touch of the fingers of eitherhand, enabling the draftsman to carry the scale for measurements inthe left hand, a practice not…
Engineering instruments · Drawing instruments
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