Any one have a scale for a Board & Gray square? I have #6796 ca. 1862 in the shop and the wire on the piano doesn't match the marking on the plate. The piano has been restrung but I'm not sure if the plate is original. The piano is 6'8" wide with 67 plain wire bicord unisons. The markings on the plate are as follows; size notes speaking length 14 10 1 5/8" 15 8 16 7 17 7 18 7 19 9 20 7 21 6 22 4 23 2 55 7/8" The wire on the piano seems to run about .001 (half size) less than marked. Would the sizes marked on the plate on a 1862 piano be equivalent to modern wire sizes? Thanks, Richard Anderson, RPT Elgin, IL
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