1935-37 Svizzera, francobolli di posta aerea n. 3 e n.16/18 soprastampati nuovo valore e sbarrette sul valore precedente in nero e in rosso. 6 valori nuovi, perfetti senza linguella. Catalogo Unificato posta aerea n. 19/24, Euro 57,00.
1935-37 Switzerland, airmail stamps no. 3 and no. 16/18 overprinted new value and bars on previous value in black and red. 6 values new, mint perfect never hinged. Unified Airmail Catalogue No. 19/24, Euro 57.00.
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