clockwork by which the hour hand is driven from the shaft of the minute hand.
Origin of motion work
First recorded in 1785–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for motion work
We may now go to the front (or left hand) of the clock, and 538 describe the dial or “motion-work.”
The district has long been noted for the superior construction of watch tools and motion-work.Drake's Road Book of the Grand Junction Railway|James Drake