3 boxwood scale rulers Vintage technology. 1 Armstrong, 2 purpose unknown
$ 10.37
Description
3 boxwood scale rulers Vintage technology 2 purpose unknown 1 Armstrong 3 boxwood scale rulers Vintage technology 2 purpose unknown 1 Armstrong Click images to enlarge Description 3 boxwood scale rulers A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale . Two of these are the same as each other. Purpose unknown. I would be interested to know what they are for They have slots cut across them at one end The other is an Armstrong scale ruler very like the ones we used at college in the 1960s before metric came to the UK building trade All measure 30 centimetres/12 inches Made from boxwood Vintage technology calculators scales Interesting for teachers and students Thank you for looking. Please order now. Get images that make Supersized seem small. Showcase your items with Auctiva's Listing Templates! THE simple solution for eBay sellers. Track Page Views With Auctiva's Counter
