Great Britain, Höster Experimental Machine: Charing-Cross, W.C., DE 8 86, bold strike of machine cancel ties Great Britain ½d blue and 2½d purple on cover to Charleston S.C.; stain and cover edge faults, Fine, A rare example of this experimental machine cancel. Estimate  $200 - 300. Albert Höster, a German national, convinced postal authorities that they should test his various machines over an 11 year period from 1882 until 1893. Charing-Cross is one of the scarcer experimentals. $0 (Image)