Seiko 9223 Movement Details

Seiko calibre 9223 is a high grade analogue quartz watch movement. Production started around 1978.
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Sub-brands: King Quartz
Battery:SR1120SW / 381 (Silver oxide)
Accuracy:±10 seconds/year
Day / date?Day + date
GMT / world time?No
Chronograph?No
Hacking?Yes
Development division:Daini (Kameido, Tokyo, Japan)
Notes:Twin quartz crystals for greater accuracy. Note that the original 1980s catalogues state ±20 seconds/year, however Seiko later produced a "Value Checking List" with battery cross-reference chart. The latest public edition of this (available here: https://service.seiko.com.au/i/seiko/documents/batteries/Seiko%20Battery%20Guide.pdf ) states an accuracy of just ±10 seconds/year. I believe they revised it based on past data, so I'm using this as the official accuracy figure.

Part Codes

Stem code: 354052