Offered here is an original 1871 Pay Voucher from the Keystone Consolidated Mining Company in Amador (City), Amador County California. For items purchased for the South Shaft that included two balls of twine and chalk lime. The Keystone Mines were some of the earliest mines in Amador County, back when it was still a part of the Mother Lode. Great display piece of Amador City mining history. Thaks for looking!