Louisville, Cal., Feby 22nd (El Dorado). Manuscript postmark (ELD-2430) with "80" double transcontinental rate on cover to Bangor, Me.; cover with small portion of backflap restored, Very Fine, a wonderful and very rare earliest known usage from Louisville, Cal. with Louisville eventually changing name to Greenwood in October of 1852. Estimate  $1,000 - 1,500. $0 (Image)