Germany, 1921, 10(pf) black olive, three singles. One overlapping another single, tied on 10pf Germania postal card to Ulm by "Stuttgart, 18 Sep 21" town postmarks, Very Fine; with 2009 A.P.S. certificate. Michel No. 159b €1,050 off cover ($1,438). Estimate  $200 - 300. $0 (Image)