Lot 23
[San Francisco] Ingersoll Rock Drill. Illustrated letterhead showing Mining Scene with Miner and Pneumatic Drill, datelined "San Francisco, Cal. May 12th, 1877" regarding the renewal of prospect note "In anticipation of the contract now under negotiation with Sutro Tunnel Co. …", F.-V.F.Estimate $100 - 150.
Realized: $45