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Miyota 82/8N Series

The 82/8N series of movements is the original automatic movement from Miyota, in production from 1976 through the present day. It operates at 21,600 A/h and most have 21 jewels. The automatic winding versions have uni-directional (counter-clockwise) winding.

Distinguishing features of the 82/8N series include a single central screw for the central winding rotor and a simple index for regulation. The balance wheel is located at 5:00 when viewed with the winding stem at 9:00 and is located with a clockwise cock.

All members of the Miyota 82 family have indirect central seconds, which causes a noticeable wobble to the central seconds hand. When struck, the seconds hand can appear to pause for up to 2 seconds due to slack in the movement.

The entire movement is held together with just 3 screws, aiding in construction but making repair more difficult.

Note that many Internet sites date the introduction of the Cal. 8200 to 1974, but the official Citizen catalog from 1979 specifically dates this movement to Shōwa 51.3, or March, 1976.

Current models are indicated in bold below.

No DateDate OnlyDay-Date
Hand Winding8270
8N33 SK
8260
Automatic
Central Seconds
8228A OH
82S0 PS OH
8N24 SK
8N26 SK HH
8210
8215 SR
821A
8200
8203
8205 SR
820A
8285 SR OD
Automatic
24 Hour Hand
8247
82D7 OH
8217
Automatic
Small Seconds
8245
82S5 PS OH
8N40 PS
8218
Automatic
24 Hour Hand
Small Seconds
82S7 PS OH8219

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