Hello people, I have an old Cortebert pocket watch which is in very good condition. It has blue metallic hands, and on the inside of the casing, it says 2552524 5413. On the actual movement, it says 15 jewels swissmade RAL.534. I would be interested to know more about it, and an approximate year of the model. I would also be interested to look at some vintage adverts for it . I have already looked at the Perseo watches site, but it is a bit vague. Any more info would be appreciated. Thanks, Chris.