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lower right in graphite: 3/150 Dennis Oppenheim 1978

text on plate: Time Line. 1968. Boundary between USA/Canada; St. John River; Fort Kent, Maine. 1" x 3" x 3' mile cut between the two countries.

Marks and Labels

stamped lower right verso in black ink: © George T. Boris


Bob Stana and Tom Judy, Washington, D.C., 1999; acquired 2016 by the National Gallery of Art

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