Penknife, blade modified to measure bark depth

A penknife with the blade modified to measure the thickness of

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A penknife with the blade modified to measure the thickness of
Science Museum Group
© The Board of Trustees of the Science Museum

A penknife with the blade modified to measure the thickness of bark in millimetres, blade marked 'Harrison Barker & Co Ltd Bark Tester', Rodgers cutlers to His Majesty, England

Details

Category:
Weighing & Measuring
Object Number:
1986-1027
type:
knife
credit:
Major F.A. Preston