Benicia, Cal., Jul 29 (Solano). Full bold cds (Williams SOL-100) in blue on 1850 rebacked cover front to Ipswich, Mass., matching "Paid" straight line and "40" rate handstamps, an Extremely Fine strike, and a very rare 40¢ transcontinental rate usage from Benicia. Estimate  $300 - 400. $0 (Image)