1st Class stamp sold for 28p. This stamp can be rubbed with a coin to reveal the "head" or the "tail" of a coin. The two versions appear identical before rubbing.
Illustrations by George Hardie.
Part of a sheet of 20 stamps and sold at £6.15. This stamp can be rubbed with a coin to reveal the "head" or the "tail" of a coin.
The two versions appear identical before rubbing. Illustrations by George Hardie.
Part of a sheet of 20 stamps and sold at £6.15. This stamp can be rubbed with a coin to reveal the "head" or the "tail" of a coin. The two versions appear identical before rubbing.
