Seiko Caliber 1220 Technical information (Japan)Watches with the 1220 movement1220-00601220-00701220-00801220-00901220-01001220-50701220-50801220-50901220-51101220-51201220-51301220-51401220-51501220-51601220-51701220-51801220-51901220-52001220-52101220-52201220-52301220-52401220-52501220-52601220-52701220-52801220-52901220-529A1220-53001220-53101220-53201220-53601220-53701220-53801220-53901220-54001220-54291220-542H1220-5439