Benicia, Cal, April 29 (Solano). Ca 1850 (Pre-Statehood) red straight line postmark (Williams SOL-90) on folded letter to San Francisco with manuscript "12½ " for Pacific coast rate during 40¢ rate period, tiny discoloration specks (not affecting marking), Very Fine, one of the finest known of the approximately 6 recorded. Estimate  $1,500 - 2,000. $0 (Image)