Provenance
Comte Robert de Pourtalès, Paris (by 1900–at least 1907)
Jeanne de Pourtalès, baronne d'Adelsward, Paris (by 1909)
comte James de Pourtalès, Paris (by 1959–66; sold to Mons)
with Mons et Cie., Paris, from 1966
with Allen Loebl, Paris, until 1967; sold to Kleinberger
with
Kleinberger, New York, 1967–75; bequeathed by Harry G. Sperling, last surviving partner of firm, to MMA
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