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Junghans Caliber J880.1
Junghans Caliber J880.1

Junghans Caliber J880.1

Brand Junghans
Caliber Number J880.1
Actual Caliber
ETA 7750
Movement Type Automatic, self-winding mechanical
Lignes 13.25”’
Diameter
30mm
Height
7.9mm
Jewels
25
Beat Rate
28,800 (4Hz)
Lift Angle
49 degrees
Power Reserve
48 hours
Rotor Style
Ball bearing system
Rotor Winding
Uni-Directional
Hand-Windable?
Yes
Anti-Shock Device
Incabloc or Nivachoc
Balance Spring
Nivarox
Hand Count 6
Functions Central hours; central minutes; central chronograph seconds; small running seconds subdial at 9:00; 30 minutes chronograph counter at 12:00; 12 hour chronograph counter at 6:00; day/date at 3:00
Hacking Seconds?
Yes
Country of Manufacture Switzerland, Swiss made
Known Models
Junghans Meister Chronoscope (ref: 027/4528.45, 027/4526.01, 027/7023.03, 027/7024.02, 027/7024.03) (Add your watch to the comments below…)

The Junghans caliber J880.1 is a Swiss made automatic chronograph movement found in the Meister Chronoscope line of watches. This caliber is basically an ETA/Valjoux 7750 with a branded rotor.

J880.1 VS J880.2:

There is a similar caliber J880.2 found in the Max Bill Chronoscope series. The J880.1 and J880.2 are both based on the 7750, but the J880.1 is a tricompax layout with a small seconds subdial at 9:00. The J880.2 has a vertical bi-compax layout with no small seconds at 9:00. Some J880.2 have a date only without the day of the week.

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K.P.
K.P.
11 months ago

Hello,

I’ve got the J880.2 in a Max Bill Chronoscope and hand wound it the day it arrived. The watch is fully functional and keeps excellent time.

I’m curious about the crown having resistance when trying to wind it.

It’s been two days now and I don’t want to break anything.

Has anyone encountered this also?

Does it work like any automatic movement or is there any specific details to know?

Best regards.

Cordially,

Ben
Ben
10 months ago
Reply to  K.P.

How are you liking the watch….accuracy of the movement, and general build quality? Thank you.

K.P.
K.P.
10 months ago
Reply to  Ben

Overall, the watch design is thought to reflect distinctive images with the right angles. The dial add a nice hue to perfect legibility during the day and the indices stay bright from the evening to the early morning. If by any chance you can get your hands on it, give it a try. The accuracy is great, I found example on social media of this movement with blued screws, perlage, cotes de Geneve and incabloc protection. This is the second watch I bought from this brand and it shows they work largely on regulating their movement with great care. You… Read more »

Ben
Ben
10 months ago

How can I tell which “grade” of the caliber is used (top, elabore, standard)? My concern is with discerning if the best/better available materials and components are used (e.g., incabloc shock protection, glucydur balance wheel, and balance and main spring materials).

Thank you.

BTW – great website….I enjoy the attention to detail.

Ben
Ben
10 months ago
Reply to  calibercorner

Thank you. Very helpful.

I understand that one obvious attribute, in addition to incabloc, could be that the glucydur balance wheel used on the top and cosc grades has flared/ curved spokes, unlike the non-glucydur wheels on the std and elabore. Any truth to this?

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