Watch stopped on watchwinder (cal 80111)

Dear CF,

I need help to ease my mind.

I bought a watch winder last winter and have been using it for the last 6 month to keep my ingenieur 140 (cal 80111) ready to go at any time.

The winder is a Modalo 120 Magma and I have been using a program which turns clockwise for two minutes, then rests for six, then repeats (uninterrupted repetition)

Never had an issue, aside from watch slowing down some. I assume it is normal for a mechanical watch running more or less constantly.

The other day tough I noticed that the watch had stopped on the winder. Taking it off the winder had it running again. Upon winding it manually I clearly felt the mainspring was more or less fully wound.

After a few manual spins I had it laying still running for an insane 51h. When it had stopped running I felt the mainspring was easy to wind, thus excluding the idea that the watch somehow could have lost energy on the winder.

My questions to any thech-savvy enough are

1. what could have caused this stop?
2. can it have damaged the watch somehow or just caused normal wear and tear?
3. How does the protection agains over winding work?
4. will a full service fix whatever could have happened?
5. does the cal 80111 wind both cw and ccw?

I would really appreciate some input here and preferably some that confirm nothing serious has happened:)

The watch is running smoothly now. In the future I will let it rest for 24h between 24h programs.

Best regards

Anton

Update + bump

Stopped yet again. When I breifly tapped the watch it started running again and have been doing so for another 5 hours, thus still wound (just stopped on the winder).

Is it time for a service?
This calibre should, what I know, be good for ca 900 rotations/day.

The program running this time was cirka 900 turns/day like follows:

Approx 4 hours alternating: ca 1 min 25 sek clockwise, 3 min 35 sek pause, subsequently approx 1 min 25 sek counter clockwise, 3 min 35 sek pause. Than 8 hours pause. Then repeat.

Input of some kind would be very much appreciated

Best regards

/A

Hey Anton,

it's impossible to take a diagnosis from distance.
So I'd recommend you have the watch checked by an experienced watchmaker.