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Paul Trebilcock
Painter
(Chicago, Illinois, 1902 - 1981)
© Estate of Paul Trebilcock
NY TIMES: Luxury Apartment Houses of Manhattan: An Illustrated History By Andrew Alpern
"... occupied since the 1930s by portrait artist Paul Trebilcock, the apartment was sold by his widow's estate in 1988."

Some information from Getty's Union List of Artist Names ® (ULAN)