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This thread is to collect and organize all information on the Citizen '4 Mega' cal. 1730 launched in 1981, as existing information is scattered such as in the TC thread.
The Exceed 4 Mega watches powered by this caliber were the last known Citizen AT-cut wristwatches before the cal. 0100 pocket watch shown at BaselWorld 2018 and First Series wristwatches released to the market in 2019.
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