Bamber & Co.'s Contra Costa Express. Bold oval handstamp on 1853, 3¢ Nesbitt entire to San Francisco with manuscript "Warm Springs" postmark, entire additionally handstamped with boxed "Answer by Bamber & Co.s Express" marking at bottom left & second bold strike on reverse, Very Fine, a very nice usage. Estimate  $200 - 300. $0 (Image)

Bamber & Co.'s Contra Costa Express. Fancy scroll frank on 3¢ pink entire to San Francisco with printed corner card of the "American House/Centreville/Alameda County, Cal.", endorsed "Enclosed Coin $5/Collect", small cover tears at top, Fine and attractive. Estimate  $150 - 200. $0 (Image)

Bamber & Co.'s Contra Costa Express. Bold oval handstamp on 1853, 3¢ Nesbitt entire used as part paste-up with 2 strikes of boxed "Answer by Bamber & Co.s Express" handstamp & straight line "San Leandro" handstamp at top right, Very Fine and scarce. Estimate  $150 - 200. $0 (Image)

Bamber & Co.'s Contra Costa Express. Bold oval handstamp on 1853-55 3¢ Nesbitt entire with matching handstamp "Answer By Bamber & Cos. Express" etc. with pointing hand, original 1860 enclosure headed "Pacheco", F.-V.F. Estimate  $150 - 200. $0 (Image)