Registry, 1911, 10¢ ultramarine (Scott F1), bottom margin plate number 5729 block of 6 with imprint and "A", o.g., lightly hinged, a pretty plate with solid color and clean design; paper fresh with stamps wonderfully centered (position 2 particularly so), Very Fine, register your approval with a bid or two. Scott $1,650 Estimate $1,000-1,500 (Image)