Scientific Instruments > Length Measuring

Hat Makers Rule. Rare

Item#: SLG1212

SOLD

 

Hat Makers Rule. Rare - click to enlarge.

A rare hat rule made of boxwood with a brass sliding caliper. The edges are protected with brass. On the back is a three column table inscribed in to the wood providing conversion values of hat size, head circumference (inches) and hat circumference (inches). The rule is marked on the side: A. Runacres 78 Union St Boro.