You can’t really go wrong with any of these. My slight preference is for the Le Locle, especially the one with the black guilloche dial on a shiny steel bracelet. Chemin des Tourelles would be my #2, but it’s a little less refined-looking to me.

The Classic Dream Swissmatic is also a fine choice, but the movements (the internal organs of the watch) of the other two are much better. They’ll last for 80 hours on a single wind, whereas the Classic Dream will be about 50% of that.

All of these are watches made in the many hundreds of thousands, so they will be extremely easy (and relatively cheap) to maintain and repair over the coming years. Congrats to your dad!

So, the criteria (from your three very excellent options) I see are as follows:

Budget of U$350-500

Dress-style watch (no number indices unless Roman numerals, hold the lume, clean dial except perhaps a date window, leather or metal bracelet only)

Mechanical/automatic movement, preferably Swiss

New (not used or vintage)

Based on these criteria (feel free to correct me if I’ve drawn some inaccurate conclusions), I may have a few more options to recommend:

Glycine Combat Classic GL0453 (silver dial)

Glycine Combat Classic GL0454 (black dial)

Seiko Presage Cocktail Time SRPB46 (rose gold, coffee dial)

Islander Brookville ISL38 (“sunburst” navy blue dial)

Orient Symphony IV (dark blue dial)

at that price range I’d lean towards quartz. A cheaper automatic won’t keep great time and if he’s not into watches he may not enjoy something that needs to be reset so often. Also it’s a gift from his son- whatever you get will have incredible value to him!