Erhard Junghans J830.1 Guia De Inicio Rapido página 4

Setting the date
Pull the winder into position B. You can now set the date by turning it
to the right. Do not make any changes to the date between 8pm and
3am, as the date is automatically advanced by the movement during
this period and you could damage the date advance mechanism.
If the month has less than 31 days, you have to set the date manually
to the first day of the following month.
Reading the second hand:
The display of the second hand is via triple-leaf second hand
(3) and the second scale (6). The following scales apply for reading:
Second scale
Outer scale: 0 to 20 seconds
Middle scale: 20 to 40 seconds
Inner scale: 40 to 60 seconds
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Technical information
Mechanical 3-hand movement with date display
Calibre J830.1
Bi-directional automatic winding mechanism with ball-bearing
28 jewels
28,800 semi-vibrations per hour
> 48 hour power reserve
Anti-magnetic to DIN 8309
Shockproof: System Junghans
Spring: Flat spring
Balance: Gold-plated nickel
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