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Technical information
Calibre J830
• Self-winding movement with date and 2nd time zone
• Bi-directional automatic winding mechanism
• 28,800 semi-vibrations per hour
• 28 jewels
• Eccentric fine adjustment
• Power reserve > 48 hours
• 3-point shock absorber, following the sample of the historical
Junghans Trilastic
• Balance wheel: Gold-plated nickel
Changing the strap
The tool included specifically for changing the strap allows you to
replace straps on your watch in just a few short steps. Always place the
watch on a soft base to perform this procedure.
Fit the tool onto the spring bar
(Fig. 1). Push the collar of the
spring bar towards the centre of
the case to release the spring bar.
Fig. 1
To fit the new strap, push one side of the spring bar into the hole
(Fig. 2). Push back the spring bar collar on the other side and insert into
the hole provided (Fig. 3).
Fig. 2
Fig. 3
