Electric rolling-ball clock, made by Futuretronics, Moorabbin, Victoria, circa 1975.

U.S. patent no. 407- 7198, held by Arrow Handicraft Corp., Chicago.

Physical Description

Rectangular black plastic base supports three tiered black plastic framework consisting of channels in which stainless steel balls are free to roll. Electric motor rotates lever that picks up one steel ball every minute, and drops it in upper channel calibrated in minutes (1 to 4). Middle channel is calibrated in minutes (5 to 55), and the lowest channel in hours (1 to 12). Clear plastic cover.

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