Bamber & Co. Express, Oakland, Apr 15, 1869, light blue oval date stamp on 1864 3¢ pink entire to San Francisco, black company frank (Haller type 4) and additional blue "J. Bamber & Cos. Express, S.F., Apr 15" cds, Very Fine, a scarcer frank and oval. Estimate  $100 - 150. $0 (Image)