Union Tool Co. No. 330 90-Degree Angle Depth Gauge (ca. 1941-1953)

Union Tool Co., circa 1941-53, No. 330 depth gauge with case-hardened steel base with a 2-1/2 inch work face accurately ground 90-degree angle to the slot in which the 6-inch rule slides. Rule graduated 32nds one side, 64ths on the other, also applied in 64ths and 100ths. Weight each: 1-1/2 oz, with 6-inch rule.