cannon pinion
noun
: a small steel tube having at the lower end teeth that mesh with the teeth of the minute wheel of a timepiece and at the upper end the minute hand which is mounted on the arbor of the center wheel friction-tight so as to allow hand-setting
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“Cannon pinion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cannon%20pinion. Accessed 22 Nov. 2024.
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