Auction of lot 72, Bollag, G., Zürich (city) (1934-04-21)
Auction of lot 72, Bollag, G., Zürich (city) (1934-04-21)
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Auction of lot 72, Bollag, G., Zürich (city) (1934-04-21)
Auction of lot 88, Sotheby's, London (England) (1970-04-08)
Set of objects for lot 72, Bollag, G., Zürich (city) (1934-04-21)
Set of objects for lot 88, Sotheby's, London (England) (1970-04-08)