Archives International Auctions - Auction 111 February 17, 2026

Archives International Auctions - Sale 111 78 February 17, 2026 Archives International Auctions www.archivesinternational.com Colorado 387 387 CO. Advance Gold Mining Bonding and Leasing Co., 1899 I/U Stock Certificate Cripple Creek, Colorado. 1899. 1000 Shares Capital Stock Certificate, Black print with black border and eagle vignette over title , S/N 341, Fine to VF condition.............................................................................................................. Est. $90-140 388 388 CO. Atlantic and Pacific Mining & Tunnel Co., 1882, I/U Stock Certificate. Leadville, Colorado, 1882. 3300 Shares I/U Stock Certificate, Black print with black border and brown underprint, American iconography at center within title, S/N 466, Empire Lith & Eng. Co. Issued in Leadville during the height of the 1881 carbonate-ore boom, the company reflects the major tunnel-driving projects that supported deeper development throughout the district. Tunnel companies were essential to draining, ventilating, and opening multiple lodes in the Leadville basin, making this certificate a meaningful example of the engineering infrastructure behind one of Colorado’s most important silver-mining eras............................................ Est. $150-250 389 389 CO. Azora Mining Company, 1882, I/U Stock Certificate. Boulder, Colorado (Incorporated in New Jersey), 1882. 1000 Shares, I/U Capital Stock Certificate, Black printing with woman leaning on shield with mining scene at center at top amongst title, S/N 79, XD to AU condition. Nation Bureau of Engraving & Printing. ....... Est. $200-300 390 390 CO. BannerGold andSilver MiningCo., 1884, I/UStockCertificate. Leadville, Colorado, 1884. 2500 Shares, I/U Capital Stock Certificate, Black print with Gold border and underprint, View of mountain at center and gold foil seal at bottom left corner, S/N 61, VF to XF condition........................................................................ Est. $150-250 391 391 CO. Boren Gulch Mining Company, 1900’s Specimen Stock Certificate Colorado. 190x. Specimen stock certificate. Red “Specimen” overprint in middle. Green border and underprint on face with orange back, Vignette of mine in valley. POC’s. Uncirculated condition. Rare mining stock with 3 found in archive. The Boren Gulch Group is a gold and silver mine located in La Plata county, Colorado at an elevation of 11,280 feet. ......................................................................................... Est. $130-200