The movement inside the new watches is Citizen's caliber 9051, a Miyota variant (Citizen owns Miyota) that runs at 4 Hz and offers a 42-hour power reserve. We first saw the caliber 9051 last year during the launch of Citizen's Series 8 collection. Citizen doesn't specify but states the caliber 9051 utilizes anti-magnetic materials for the balance spring and escapement to increase the watch's daily-wear potential.
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