unused  25c. blue and purple, variety overprint inverted, lightly mounted mint with gum a little toned. Scarce. R.P.S. Certificate (1981). S.G. 43a, £850. Photo
unused 25c. blue and purple, variety overprint inverted, lightly mounted mint with gum a little toned. Scarce. R.P.S. Certificate (1981). S.G. 43a, £850. Photo

Details
unused 25c. blue and purple, variety overprint inverted, lightly mounted mint with gum a little toned. Scarce. R.P.S. Certificate (1981). S.G. 43a, £850. Photo