2 Sotheby catalogues de vente d'importantes collections numismatiques :
1) SOTHEBY & Co., Zürich. METROPOLITAN MUSEUM OF ART. THE COLLECTION OF ANCIENT AND LATER COINS THE PROPERTY OF THE METROPOLITAN MUSEUM OF ART. PART II: GREEK COINS FROM THE JOHN WARD COLLECTION.
Zürich,
4-5th April 1973
2) SOTHEBY & Co., Zürich. METROPOLITAN MUSEUM OF ART. THE COLLECTION OF ANCIENT AND LATER COINS THE PROPERTY OF THE METROPOLITAN MUSEUM OF ART. PART I: ROMAN GOLD COINS.
Zürich,
10th November 1972. In 8°. 1, (1),
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