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Clip: Season 16 Episode 27 | 2m 22s
In Vintage Pittsburgh, Polly Sartori appraises an Arnould Heyermans Oil, ca. 1880.
Aired: 07/29/12
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An expert explains the evolution of Navajo weaving from the 17th to the 19th century and uncovers the distinctive characteristics of the three phases of Navajo Chief's Blankets.
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