The Dugena 1015 is a Japanese-made automatic movement with 21 jewels and a frequency of 21,600 vph. This movement is utilized in the Citizen "NJ" line of dress watches, which were introduced on May 23, 2023. The 8210 movement features various functions including automatic winding, sweep seconds, and quickset date. It also incorporates shock protection for enhanced durability. This caliber has been in use since 1974.