École Professionnelle de Tramelan - identification & value?

École Professionnelle de Tramelan - identification & value?​

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Hello everyone,​

I would appreciate some help identifying and valuing this vintage Swiss watch.

The dial reads:

ÉCOLE PROFESSIONNELLE
TRAMELAN
CHRONOMÈTRE

The watch is in very good/excellent overall condition, especially considering its age. The dial is original as far as I can tell, the case is in very nice condition, and the watch is currently running properly and keeping time.

The movement is manually wound and appears to be a high-quality Swiss movement. I have attached photos of both the dial and movement. There is a “591” marking/number visible on the movement, but I am not certain what exactly it refers to.

I understand that watches from École Professionnelle de Tramelan can be interesting because of their connection with Swiss watchmaking schools, and I would particularly like to know more about this specific example.

Could anyone help with:

1. Identifying the movement/calibre and approximate production date.
2. Confirming what the “591” marking represents.
3. Identifying the case/maker if possible.
4. Most importantly, what would be a realistic market value for a watch like this in its current condition?

I'm not looking for an insurance value or an optimistic auction estimate - I'm mainly interested in what it could realistically sell for to a collector.
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Thank you in advance for any information or opinions.

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This is always difficult to value those "watch school" watches.

It depends on the movement, IWC movement is not the best for this kind of watch, also the chronometer grade shows student took care of his work.

It depends on the case, this one seems ordinary.

Has it been overhaul ? The racket position is "sur le retard".

If you want to sell it at good price it's important, you have an overhaul made by a reputable watchmaker with no polishing of the case and of course better photos. Without this overhaul price will be not precise and buying it will be lottery.