Great Britain 1936 KEVIII Coil Vending Leaders. Vending machine coils were introduced during this period, this group consisting of 3 leaders for the ½p value, for rolls of 480, 960 & 1,920 stamps each with single stamp at end; also 1p value with leaders for 960 & 1,920 stamps each; plus couple postcards with misadjusted coil examples affixed. SG No. 457-458 var. Scott No. 230-231 var.  Estimate $100 - 150. $0 (Image)