moma-prints:

Eastern Daylight Flux Time, George Brecht, Robert Filliou, c. 1977, MoMA: Drawings and Prints

The Gilbert and Lila Silverman Fluxus Collection Gift
Size: overall: 2 7/16 x 1 15/16 x 9/16" (6.2 x 5 x 1.5 cm)
Medium: Engraved metal pocket-watch case, containing objects in various media

http://www.moma.org/collection/works/127180