Yam, Cal (Merced County). Provisional manuscript (Williams unlisted) on April 12, 1911 post card to Atwater, Cal., franked with 1Ā¢ green, Very Fine, open 15 February 1911 to 13 August 1912, 18 month office, only known copy. EstimateĀ $150 - 200. $0 (Image)