Hello Ignasi,
Apologies for not spotting this earlier or replying via the website, I have been on holiday and unfortunately was then ill for several weeks.
I think when this watch was sold as a Swiss Officers Watch the seller was applying a very broad interpretation of those terms. The watch is Swiss made and it is of a good quality and may have belonged to an officer but there is nothing to show that it ever belonged to anyone in the military.
You have got the date from the site and the movement in almost certainly a Helvetia 82A (possibly 82C) the same as used in Helvetia's German military DH watches as it was made about the same time.
It looks a reasonably large watch for the time, is it 34mm?
I'm afraid there isn't much more I can tell you apart from the above.
Thanks.
Carl
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