The 75th Anniversary of the Death of Ludwig Boltzmann 1981
Ora in esposizione: Austria - Francobolli postali - 1981 - The 75th Anniversary of the Death of Ludwig Boltzmann - 1 francobolli.
1981
The 75th Anniversary of the Death of Ludwig Boltzmann
4. Settembre WM: Nessuno Dimensioni del foglio: 50 Disegno: Alfred Nefe y Sepp Buchner. Dentellatura: 14¼ x 13¾
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