Very Rare 18th Century Bone Proofing Slide Rule By T.gill London 1775 - 1799
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Very Rare 18th Century Bone Proofing Slide Rule By T.gill London 1775 - 1799:
A Very Rare Bone Alcohol Proofing Slide Rule By T.Gill London 1775 - 1799. A very rare MuseumPiece.
There is one other different version rule in the Power house Museum in Sydney, Australia.Rule has a two small chips please see pictures. No chips can be seen from the front when rule is closed.On 14-Jul-13 at 21:31:24 BST, seller added the following information: