A 2nd century Roman marble eagle offered by Kallos Gallery.

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The dramatically modelled sculpture, 15½in (39cm) tall, was previously in the collection of Wright S Ludington (1900-92), a well-known US art collector.

He was one of the founders of the Santa Barbara Museum of Art where the eagle was displayed from 1978-99.

It is available from the London gallery for a price in excess of $100,000.