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"Only if it turns out that reality is actually nothing more than a holographic illusion created by the interplay of subatomic particles on a vast two-dimensional membrane."

This article covers a subject that has been deemed non-canon by either the author or the Back to the Future licensees, and thus should not be taken as a part of the "real" Back to the Future universe.

Chronometric clock

The Chronometric Clock in 1931.

The Chronometric Clock was constructed for the Hill Valley Science Exposition in 1931.

History

The clock was named after chronometry, the science of time keeping. It was meant to keep time through the device's spinning rings, however it seemed to be more decorative than useful. Marty McFly commented that he found it difficult to tell time using it.

Appearance

See also