This is a manual for adjusting a large calendar window perpetual calendar watch. It introduces the functions of the watch, the names of the parts, the check point, the reset of the check point, the adjustment of time, and the adjustment and observation of year, month and day.
This manual describes the features of the BT0 solar‑powered perpetual calendar watch, including its large calendar window, automatic month‑end date adjustment before February 28 2100, one‑year operation in darkness after a full charge, over‑charge protection, and low‑battery warning.
It provides step‑by‑step instructions for checking and resetting the reference position, adjusting the time, and setting the year, month, and day, with detailed button operations (A and B) and crown positions. This manual is written in Chinese.
| Movement number | E31 |
|---|---|
| Battery life in darkness (full charge) | 1 year |
| Over‑charge protection | Yes |
| Low‑battery warning | Yes |
Pull the crown to position ②, hold the B button for more than 5 seconds until the windows reset to “00”, then press B again or wait two minutes for the original date to return.
When the seconds hand reaches 60 seconds, pull the crown to position ② and rotate it forward or backward to set the hour and minute hands, paying attention to the AM/PM indicator.