Junghans BOGNER J800.1 Manual Del Usuario página 4

Setting the date (varies by model)
Do not make any changes to the date between 08:00 p.m.
and 02:00 a.m., as the date is automatically advanced by the move-
ment during this period and you could damage the date advance
mechanism.
Technical information
20
Instructions for use
Calibre J880.1
Important note:
Do not make any changes to the date and day between 08:00 p.m.
and 02:00 a.m., as the date and day is automatically advanced by the
movement during this period and you could damage the advance
mechanism.
Winding up the watch
21