B65-67 IVORY IRONMONGER'S RULE. Rabone & Son. Three-fold, one foot with German silver hinges and caliper. Includes a hundredweight table and tables for the weight of flat, round and square iron stock as well as "coppers", which were round-bottomed copper vessels. Marked John Rabone & Son on one edge and with user name on another. Overall light yellowing and wear with edges rounded, several grooves cut across the caliper slide. The three-fold form was used almost exclusively for ironmonger's rules. From the collection of David Jeffers. Good 200-400