Junghans J82/1 (682.72)
Description
Probably the most impressive and beautiful movement from Junghans is the Caliber J82, produced in the 1950s, here in its non-chronometer version with a central second hand, more precisely, caliber J82/1, later also known as the Junghans 682.72.
base plate
The gold-plated plates alone are a sight to behold, and the contrast with the red ruby jewels is simply perfect.
gear train
The gear train of this pretty large 28mm (12 1/2 or 12 lignes, according to literatore) windup movement is classical: The mainspring barrel drives the center minute wheel, followed by third wheel, seconds wheel at position 6 o’clock and escape wheel.
On the side view, you can see, how high this movement builds.
side view of the gear train
Of course, the Junghans J82 uses a swiss pallet lever escapement, and as balance, a Glucydur screw balance is used, which is beared in two inhouse shock protections of type Junghans II.
With a beating rate of 18000 A/h, it is a slow beating movement. The regulation happens traditionally with the help of a long regulator arm.
inside the gear train bridge
The gear train bridge represents a special design feature. Since the central seconds arbor is indirectly driven, it is designed as a one-and-a-half-tiered structure, with a friction spring guided from the inside(!) into the recess and thus into the bearing of the central seconds arbor to ensure the smoothest possible running of the central seconds display.
w/o center seconds pinion
The central seconds arbor is driven indirectly via the third wheel, which, thanks to its ingenious design, is single and not double executed, as is usual with indirectly driven central seconds.
center seconds axle
The center seconds axle is beared under a large framed bearing ruby.
Junghans J82/1: Dial side
On the dial side, the gold plating is also striking, as well as the Junghans II shock protection of the balance wheel and the very robust clutch winding mechanism.
The hallmark “K1” represents the production date of October 1961, which indicates one of the very latest examples, as according to literature, the Junghans J82/1 was only manufactured between 1953 and 1960.
In the lab
Timegrapher result
Although the movement seemed now too much used, it performed on the timegrapher far below its capabilities, since we know, that with an improved balance system, it can perform within the chronometer specs.| horizontal positions | |||
|---|---|---|---|
| dial up | +8 s/d | 304° | 2.1ms |
| dial down | +24 s/d | 283° | 2.1ms |
| vertical positions | |||
| crown right (12 up) | +29 s/d | 270° | 2.1ms |
| crown up (3 up) | -6 s/d | 274° | 2.0ms |
| crown left (6 up) | +6 s/d | 268° | 2.5ms |
| crown down (9 up) | +32 s/d | 271° | 2.5ms |
Technical data
| Manufacturer: | Junghans |
| Caliber: | J82/1 (682.72) |
| Caliber base: | Junghans J82/1 |
| Size: | 12 1/2''' (measured: 28,0mm) |
| A/h: | 18000 |
| Number of jewels: | 17 |
| Escapement: | Pallet lever |
| Balance types: |
Glucydur screw balance (two legs) |
| Shock protection(s): |
Junghans II |
| Balance bearing / direction hairspring: | Clockwise |
| Moveable stud: | no |
| Adjust mechanism: | Long regulator arm |
| Construction: |
|
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 4 hole(s) |
| Attachment of setting lever: | screwed |
| Features: |
|
| References: |
Feilner: Bl.36 2751 Flume: 1957 37 |
| Production years: | 1953-1960 (1961?) |
| Inventory number: | 24002 |
Usage gallery
Junghans gents watch