2½d Indigo Blue (toned paper). A superb UNMOUNTED MINT example of this VERY RARE George V shade. We also only send to confirmed addresses. 373 variety N21 (15) 2½d Indigo Blue (toned paper) A superb UNMOUNTED MINT" is in sale since Friday, October 21, 2016.This item is in the category "Stamps\Great Britain\George V". The seller is "bbstampsltd" and is located in Basingstoke. This item can be shipped worldwide.