Seiko 8L21 Movement Details

Seiko caliber 8L21 is an automatic (with hand winding) watch movement. Production started around 2003 and production finished in 2007.
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Sub-brands: Brightz
Power reserve:50 hours
Accuracy:+15/-10 seconds/day (Seiko "B" standard)
Day / date?No
GMT / world time?No
Rate:28,800 bph
Number of jewels:24
Development division:Shizukuishi Studio (Iwate Prefecture, Japan)
Notes:Similar to cal. 9S51 but without the high-end finishing.
Related movements: 8L35 9S51