I just use these or similar, theyre thick pvc ziplock bags which don’t allow watches to scratch or dent eachother, great for moving them around, shipping them when needed, and you can just stack them in the box inside these sleeves. I bought a 100 pack 10 years ago and have only just run out.
I don’t want to be carrying a watch box or anything that implies watches to or from the safe deposit facility, if I’m carrying a couple, they’ll be in these PVC sleeves in my pockets, and if its a bunch they’ll be in a crummy looking plastic K-Mart bag, not in anything fancy or Louis Vuitton printed.
https://www.ebay.com/itm/224688444338