Archives International Auctions - Auction 111 February 17, 2026

Archives International Auctions - Sale 111 87 February 17, 2026 Archives International Auctions www.archivesinternational.com Colorado territory 432 432 CO. Gold Mining Co. of Colorado, 1864 I/U Stock Certificate Gilpin County, Colorado Territory (Offices & Inc. in New York, NY), 100 Shares I/U stock certificate, black on buff with ornate border and three steel-engraved vignettes including an allegorical figure and prospector at left, a busy mining camp at upper right, and a small scene of Native American hunting buffalo below, “Mining Works, Gilpin Co., Colorado” noted at bottom, signed Edward T. Latham, Secretary and George Hyatt, President, organized in 1864 during the New York–financed boom to work gold lodes in Gilpin County and typical of issues traded on the New York Mining Stock Board, the condition ranges from Choice Fine to VF condition or better, Printed by Sarony, Major & Knapp, New York. ............................................................................................... Est. $350-500 433 433 CO. Helmick Silver Mining Company, 1869 I/U Stock Certificate Colorado Territory (Inc. in Colorado, offices in Washington, D.C.), 1869, 10 Shares I/U stock certificate, black print on white paper, ornate border, central vignette of miners working underground with pick and wheelbarrow, embossed company seal at lower left, issued December 14, 1869. S/N 39, The Helmick Silver Mining Company was incorporated under the laws of Colorado in November 1869 with $300,000 capital stock divided into $100 shares. Early post–Civil War era mining venture, reflecting the rush for Colorado’s silver lodes during the formative years of organized mining investment in the territory. Choice VF condition or better. ...................................................... Est. $250-400 434 434 CO. Porter Gold & Silver Mining Co., 1863, I/C Stock Certificate. Butte, Colorado Territory, 1863, 25 Shares Capital Stock I/C Certificate, Black print with black border, Farm and mine at top center under title, S/N 23, Hand cancelled over face of certificate, Fine to VF condition with splits and missing right corner. .............. Est. $180-250 kansas 435 435 KS. International MiningCo., 1888, I/UStockCertificate. Kansas City, Kansas, 1888. 700 Shares Capital Stock I/U Certificate, Black print with gold border and green underprint, Mining vignette at center under title, S/N 192, VF to XF condition. ................................................................................................................................... Est. $90-140 436 436 KS. Rio Bonito Silver Mining Co., 1883, I/U Stock Certificate. Kansas..., 1883. 10 Shares Capital Stock I/U Certificate, Black print on black border with brown underprint, Vignette at center under title and at bottom left corner, S/N 9, VF to XF condition. Possibly a Colorado mine. Needs further research............................ Est. $75-120