eight-day clock

Noun

a clock that only needs to be wound once every week.

Japanese Meaning

1週間に1回だけゼンマイを巻けば十分に動作する時計

The antique shop owner proudly demonstrated the eight-day clock, explaining that it only needed winding once a week.

骨董品店の店主は、週に一度だけ巻けばよい時計を誇らしげに見せ、その仕組みを説明した。

Sense（1）

a clock that only needs to be wound once every week.

eight-day clocks

（ plural ）