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A visit to the Junghans Museum in Schramberg, Black Forest. (Part 3 - how spiral springs were made)
This section of the museum shows how spiral springs were made by Junghans. Since it is quite technical, I will simply add the descriptions by the museum.
Wire drawing - explanation see below
Wire rolling
Coiling
rolling, turning and sawing
Riveting
Manual inspection of the springs
Calibration with a watch timing instrument
electronic testing of the number of strikes
Now we are moving down another floor and have a look a the watches actually made by Junghans - check part 4 of the visit
End of Part 3
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A visit to the Junghans Museum in Schramberg, Black Forest. (Part 3 - how spiral springs were made)
This section of the museum shows how spiral springs were made by Junghans. Since it is quite technical, I will simply add the descriptions by the museum. Wire drawing - explanation see below Wire rolling Coiling rolling, turning and sawing Riveting Manual...
Most welcome. I hope you have the opportunity to see it one day
Watch wise for sure not to be compared to the museums in Switzerland, but it is interesting in its own right. Stefan
A shame that Junghans coud not capitalize on theire skills in manufacturing balance springs
In house balance springs are for a watch enthusiast one the most important thing, a reason to buy a watch. Thank you for the reminder of Junghans glory days.
Actually it seems that the balance springs might have been made not but Junghans, but by a supplier named Carl Haas.
It is not mentioned, but in the back there are some displays of various watch related suppliers from the region, and one of them is Carl Haas. It still exists and it is also based in the same small town of Schramberg Stefan
After reading your post I made a research on the internet, which is one reason for me to be here on this forum: inspiration for researches
It looks like that Carl Hass has supplied the balance springs in the past to Junghans. Carl Haas and Junghans are now under the roof of the same company but I did not find a source saying that Junghans is using springs from Carl Hass. Can you tell more ab...
Junghans is using ETA for their manual movements, if i am not mistaken. So no Carl Haas springs
I noticed the same as you - same owner for Junghans and Carl Haas. I noticed that a few years back Junghans produced some high-end limited editions with what seems own movements (not sure they were developed inhouse or based on another movement) . I presu...
Junghans caliber J330 used a Carl Hass balance spring
The spring is blue and comes with a Breguet overcoil finish. The movement J330 uses in "important areas" inhouse parts, like the balance wheel and this elusive balance spring. Thank you for your input. Best Moritz
Thanks Moritz, there is always more to learn
I think those calibres are rare, I have never come across one. Best Stefan