my side Marco.
Touching story and a watch that's sublime, the perfect combination for a first post.
I think you will find that no one here wants to slap you, hehe. We all come to a love of watches in our own way and your journey to it is as good as any. What a lovely an thoughtful connection you will always have now. I really enjoyed your story.
Unfortunately, I can offer little assistance, although some others here may be better able to help based on their knowledge of vintage pieces. To get a real wealth of knowledge, you actually will need to take it to a good watchmaker and ask them to open the watch. Their will be information inscribed on the caseback and there will be numbers on the movement itself. Those are what is needed to understand exactly what it is and when it was produced. I would recommend getting close up, high resolution phtotos of the inside of the case back and of the movement while opened. One of the delights of that watch will be the inside. The real treasure is usually buried.
Thank you for sharing your story hear and welcome to "the family".
If it was recently serviced, is it possible that there is paperwork from that service? If so, it may contain two critical pieces of information - movement number and case number. From there, life gets much easier for you.
It looks like a great family heirloom! Congratulations, though I'm very sorry to hear about your grandmother :-(
I'm going to guess there is either a Cal. 1003 or Cal. 1002 movement inside the watch. To accurately determine the year it was made, somebody will have to open up the case back to read the serial numbers from both the movement and case (the numbers will be different). While the case back is off, see if you can get a good picture of the movement.
One note, it looks like the hour marker at 12 o'clock has a broken corner? But that just may be an illusion due to reflection off of the crystal?
Very nice indeed, Marco!
Welcome and congratulations, an excellent heirloom to continue passing down to children and grandchildren.
Wear it in good health.