The Banker deposit is a quartz vein paralleling the bedding in quartzite of the Mississippian to Lower Permian Milford Group. Galena is associated with sphalerite and pyrite in a gangue of quartz, calcite and crushed country rock. The ore shoots seem to have been localized in zones where the vein and strata dip flatly.

A total of 4346 tonnes of ore was mined from the Banker, primarily from 1927 to 1937 but also in 1909, 1959 and 1960. From this ore, 1,916,941 grams of silver, 1,016,876 kilograms of lead, 24,567 kilograms of zinc and 31 grams of gold were recovered.

The Banker claim is located on a high bluff to the west of Ainsworth. The orebody is found on the extension of the vein through the Highlander and Albion claims. Originally staked in 1890 by A.D. Wheeler, the claim has been worked intermittently since that time. H. Giegerich acquired the claim prior to 1909. The Consolidated Mining and Smelting Co. Ltd. held a lease on the property from 1913 to 1928.

Underground workings up to 1928 consisted of an inclined shaft following the dip of the vein for about 60 metres. Two drifts extend southerly along the vein at depths of 7 and 18 metres, the upper one 49 metres long has been largely stoped through to the surface, the lower one was driven for 21 metres. A crosscut tunnel was driven from the bottom of the bluff to explore the vein at a depth of about 116 metres. The tunnel was extended to 218 metres. At 190 metres from the portal drifts were run north and south, the northerly one 96 metres long.

From 1928 to 1937 the property was worked intermittently by a number of leasers, the greater amount of work being done by Banker Mines Ltd. and Ainsworth Mines Ltd.

The property was acquired by Yale lead & Zinc Mines Ltd. in 1949 and was worked, along with the Highlander, Albion and other claims, up until 1959. A raise was driven from the Highlander workings to the 2,500 Banker adit. A 2,300 sublevel was driven off the raise and stoping carried out from this level and from the 2,150 level. A raise was driven from the 2,500 level to connect with the bottom of the old Banker shaft workings. A31 the ore was taken out through the Highlander tunnel. In 1956 the 1,900 level Highlander Tunne.1 was being driven toward the-Banker orebod7 but apparently no ore was found at this depth. The company closed down in 1938 but leasers continued operations through 1959 and part, of 1960.