US #35; 10¢ WASHINGTON. With San Francisco Date cancel. Rich color, bold San Francisco Apr. 11 circular datestamp cancel. Very Fine used pair. Offers are not accepted unless you see the “Make Offer” feature within the listing. At our discretion, we may opt to self-insure any order. Stamps described with faults are NOT returnable. Member of the American Philatelic Society. Create listings that get noticed! With Auctiva’s 1,800+ Templates. Track Page Views With. Auctiva’s FREE Counter.