[vunderba]

TIL - this is very cool. It looks like somebody actually put together a wari-koma (temporal) watch in 2011 as well.

https://www.masahirokikuno.jp/watches/temporal-hour-watch/

[rendaw]

The non-fixed type system per https://ja.wikipedia.org/wiki/%E5%92%8C%E6%99%82%E8%A8%88 was called "futei jihou" (non-fixed time system), same with other sites https://museum.seiko.co.jp/knowledge/relation_16/ . "Temporal hour system" seems like the correct translation.

My guess is that "wari koma" here means basically "separated panels" (wari: broken, koma: panel). Wadokei means (traditional) Japanese timepiece.

[FinnKuhn]

If you want to look at some old ones the Seiko museum in Tokyo has a few. Entry is free and I can only recommend it.

[vunderba]

Thanks for the tip! The wadokei clocks on the museum's site look incredible.

https://museum.seiko.co.jp/en/collections/traditional_Japane...