(Imperial) Wells, Fargo & Co., Fort Yuma, Apr 3, full clear strike of blue oval date stamp on fresh 1864, 3¢ pink franked entire to San Francisco, reverse with "Apr 11, 1871" receiving handstamp, Very Fine and choice, a very rare express usage from Fort Yuma and certainly one of the finest examples known. Estimate  $400 - 600. $0 (Image)