A Quality pair of Proportional Dividers

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A Quality pair of Proportional Dividers.

A finely made pair of precision drawing tool. Surprisingly unnamed as to a maker, but they are of identical quality to the major German or English makers of the period.

The scales are engraved "Plans" "Circles" & "Solids". Of the two wheels, one rotates from a thumb screw on a sort of rack & pinion screw mechanism. It's housed in a brown  leather style covered case, with a blue silk & velvet interior with a pin bar clasp, similar to Riefler or Richter cases.

The proportioning dividers measure approx 16 cms long when closed. The case is approx 20.5 cm long.

In expected used & excellent condition for an item of this age & nature.

Please study the images as they also form part of the description & please do your own research.

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