B58-436 IVORY RULE. Stanley No. 0. Two fold, six inch, German silver trim and round hinge. The No. 0 and No. 00 rules were never listed in any Stanley catalog, and were too small to be of practical use. They were probably made out of scrap pieces of ivory as promotional items. Marked "Stanley Made in USA." Lightly yellowed with some tight checks. Good+ 300-600