International Labour Bureau - Overprinted "B.I.T. 1937" 1937
Now showing: Czechoslovakia - Postage stamps - 1937 - International Labour Bureau - Overprinted "B.I.T. 1937" - 3 stamps.
Now showing: Czechoslovakia - Postage stamps - 1937 - International Labour Bureau - Overprinted "B.I.T. 1937" - 3 stamps.