Name/Title
Calibrator and fold out rulersEntry/Object ID
7657Description
First one, a multi calibrator of various, materials made by Rabone and Son Birmingham. Beautiful condition. A slide rule is incorporated in this. It's fitted into the frame. Fabulous piece of workmanship. Second one is a small, fold out ruler made by Hockey Abbey, probably English, still in good condition. The third one is a very hard one to find. The smallest of the fold out rule is made by Stanley USACollection
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