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.Video on YouTube
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 J93 with decentral second and 15 jewels was later known with its caliber number Junghans 693.81.
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.
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.
Timegrapher resultThe 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. On the timegrapher (here in double precision), the fair condition could not be verified, unfortunately; the J 93 showed big variations in all positions, ranging from -2 1/2 minutes per day to +40 seconds per day.
|Size:||11''' (measured: 25,0mm)|
|Number of jewels:||15|
Nickel anular balance|
|Balance bearing / direction hairspring:||Clockwise|
|Adjust mechanism:||Long regulator arm|
|Construction type:||solid construction|
|Winding mechanism:||rocking bar winding system|
|Setting lever spring:||2 hole(s)|
|Production period:||1954 - 1966|
Flume: 1957 36|
|Mentioning in literature (years):||1954|