RARE NAUTICAL BRADBURN (1834 - 1852) BOXWOOOD ROPE CALIPER GAUGE
RARE ANTIQUE THOMAS BRADBURN & SONS (1834 - 1852) BOXWOOD BRASS ROPE CALIPER GAUGE THIS CALIPER GAUGE IS FOR MEASURING DIAMETER AND CIRCUMFERENCE OF ROUND WIRE ROPE AND IN TURN CONVERTING INCHES TO POUNDS, THE MAKERS NAME IS STAMPED ON THE FRONT ie "THOMAS BRADBURN & SONS MAKERS BIRM." ON THE REVERSE SIDE IS A CHART FOR DETERMINING THE WEIGHT PER FATHOM OF EITHER HEMP ROPE OR MANILLA AND EACH OF THESE IN TURN IS BROKEN DOWN TO CABLE, SHROUD & SIZE THOMAS BRADBURN AND SONS WERE RULE A