Interior view of signs, displays and easel, probably at a Colorado Mining Association convention in Denver, Colorado. Signs read: "For Denver, For National Defense" "Power Plants-Transmission Lines-Equipment" "For Dependable Service" "The Mine & Smelter Supply Co." "Denver Salt Lake, El Paso, New Yo[rk]" "Timken Rock Bits" and "Ample Electric Power Here For Mining..."
Accession number: 88.442.316; History Colorado.; Inked on negative reads: "3216."; Title, "Nitrate Film" and "3216" penciled on negative envelope.; R7200058762
