GRENADA 1972 'AIR MAIL' on 15c VARIETY OVERPRINT DOUBLE, SG 504a. This variety appeared in Gibbons Stamp Catalogue Column in Nov 2015 ( details with lot) This is the 'discovery' copy; unique

Lightly Mounted Mint

See scan for details. 

Postage: -Uk Free -US, Europe: £3.00 -Worldwide: £7.00

I combine postage subject to weight (For multiple orders, please ask for postal rate)