I use peli case to transport high value electrical equipment for work. They are the best products in the business and keep products safe. For watch cases they are a bit of an oddity, you use peli case in environments where they'll be exposed to a lot of knocks, drops etc. it's for industry and other heavy applications. I don't see your valuable swiss watches being manhandled in this way to warrant protection like this. For valuable watches it's better to be discrete and not show that you're carrying something of value while travelling. I think for carrying your watch collection there are more discrete ways of doing so. It's also not a great look to have on your night stand or wardrobe or dresser.
rivyTwo of these would do the trick. In your carry on/backpack. I got one when it was offered here and I have traveled with 3 watches routinely. Certainly offers enough protection for my needs. But I didn't run with the bulls in Pamplona with my backpack either so your needs may vary.
https://drop.com/buy/wolf-blake-watch-rolls