Bidspirit auction | A Collection of Antique and

A Collection of Antique and Vintage British Measuring Instruments and Calculation Gauges including J. Rabone and Sons - An assortment of antique and vintage measuring and calculation instruments, primarily of British manufacture. The collection includes a brass-mounted hardwood spirit level by J. Rabone and Sons, Birmingham, which features circular stamps for the maker and a Warranted Correct mark with a hand-and-weight trademark. Also present is a specialized boxwood and brass slide rule gauge for calculating rope and chain weights, with printed tables for Wire Rope, Hemp Rope, and Chain using fathoms as the unit of measure. The group further comprises a two-fold boxwood rule with an integrated spirit level stamped Birmingham England, a white-faced logarithmic slide rule in a stitched tan leather case, a yellow-lacquered multi-fold rule, and a dark-stained wooden folding rule with brass fittings. Rabone Spirit Level: 15.3 cm length Rope Weight Calculator: 11.4 cm length Two-fold Rule: 61 cm (24 inches) total length Slide Rule: 25.4 cm length.