(San Joaquin) Linden, Cal., Mar 4 (1863). Double circle postmark (SAJ-1270) with target cancels on 3 5¢ brown #76, to Canada West, endorsed "Overland via Detroit & Toronto", further markings on reverse, slightly reduced at right and some trivial wrinkles, almost Very Fine, earliest known cover, in 1st month of use. Estimate  $500 - 750. $0 (Image)