The Junghans J93, which debuted in the 1950ies is a pretty large and rugged
mens' wristwatch movement, which was due to its pallet lever escapement and
the shock protected balance among the "better" movements from germany.
How successful and versatile that movement was, can be seen on the facts, that
it was available in a lot of different version, some with decentral second,
some with center second, some with date indication, different amount of jewels etc.
Common for all of them is the movement construction with its large
two-leg ring balance, which is safely beared in two inhouse shock protection
bearings with giant jewels. The effective length of the hairspring, whose one end is fix
attached to the hairspring cock, can be regulated by a long regulator arm over a scale.
Together with the pallet lever escamepent, this guarantees good precision results.
There's an interesting detail on the specimen shown here: It is marked as "93/1", although
a caliber 93/1 with decentral second hand is unknown in literature, since the
93/1 was the version with center second hand.
The Junghans J 93 with decentral second and 15 jewels was later known with its
caliber number Junghans 693.81.
main plate
The inner side looks well ordered and was made out of the full: This movement uses no cheap
pillar construction, but was a massively made construction. This was very important for the
"Trilastic" series of Junghans watches.
dial side view
On the dial side, you can see a little cost-saving, since a cheaper
rocking bar winding mechanismn was used. But on the other side, its
click mechanism with a true and well made click spring showed the optimum
of that construction.
Technical data
Manufacturer
Junghans
Caliber
J 93
Number of jewels
15
Escapement
Anchor with pallets
Balance
Nickel
Shock protection(s)
Junghans
Balance cock direction
clockwise
Hairspring stud
fixed
Regulator type
Long regulator arm
Movement construction
Fork Escapement wheel, Fourth wheel, Third wheel, Center wheel Mainspring barrel
Construction type
solid construction
Bridge shape
One-third plate, rounded at the balance, 4 gears
Winding mechanism
Rocking bar
Features
s
Functions
Hour, minute, small second
Beats per hour
18000
Size
11\'\'\' (measured: 25,0 mm)
Image in Flume Werksucher
1957 36
Factsheet
Test Results
The movement shown here smelled very strong like a ship diesel engine.
Because of that it was completely cleaned and oiled, but the smell stayed.
The technical condition is quite OK, especially, when you take the age and
long useage of the watch into account.
Timegrapher Protocol
On the timegrapher (here in double precision), the fair condition could
not be verified, unfortunately; the J93 showed big variations in all
positions, ranging from -2 1/2 minutes per day to +40 seconds per day.
dial down
dial up
12 up
3 up
6 up
9 up
Measured Values
horizontal positions
dial down
+26 seconds/day
dial up
+40 seconds/day
vertical positions
12 up
-80 seconds/day
3 up
+5 seconds/day
6 up
-35 seconds/day
9 up
-150 seconds/day
timegrapher measurings
The power reserve was 48 hours - a very good value!
