San Francisco to Switzerland, 1875, Uprated Entire with All-Over Advertising, Mailed on Last Day of Higher Rate. 3¢ entire franked with 1873, 7¢ orange vermilion, postmarked San Francisco June 30 [1875], at midnight the 10 cent treaty rate dropped to the new 5 cent UPU rate, though the sender may have been unaware of this, with original enclosure; stamp with minor indentations from canceling device, otherwise Very Fine. Scott No. 160  Estimate $300 - 400. $0 (Image)