Bishop Harman trial frame gauge

Catalogue Number: 1950
Bishop Harman trial frame gauge
Category: Equipment
Sub-Category: Trial Frame
Year Of Publication/Manufacture: 1930s
Time Period: 1900 to 1939
Place Of Publication/Manufacture: London W1, UK
Publisher/Manufacturer: Therodore Hamlin
Description Of Item: Brass template shaped to insert in both cells of a trial frame, marked 'BISHOP HARMAN TRIAL FRAME GAUGE' on the right side and 'THEODORE HAMLIN LONDON W1' on the left side. The joining bridge is marked 'SET AT 60 mm'. A degree scale is engraved aroud the perimeter of each circular part.
Historical Significance: This is presumably a gauge for checking the accuracy of scales on a trial frame.
How Acquired: Donated by Pamela Sutton, honorary archivist. Purchased from BOA Museum
Date Acquired: July 2011
Condition: Very good
Location: Archive office. East wall shelves unit 3. Drawer 5

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