Looked for a BIFL pepper and salad grinder myself for several years. The most obvious good ones are the Peugeot, which you already have linked to yourself. The models which are in my opinion nice (painted models) are unfortunately not very robust and therefore don’t age very gracefully or take mishaps during use that well. Wooden kitchen products are per se not BIFL IMO. They now also have stainless steel models, but I think that looks silly in the very curvy, classic design of the Paris model, not to mention that it’s not all-metal, but actually has several plastic insert parts. I haven’t looked into their construction too much to evaluate them, but they might be the best to get from a BIFL perspective. But then also the pure stainless steel models, no the ones with the coating like the black or the copper ones - without being able to tell it with full confidence - the coating will most likely be less durable than the pure brushed metal.

I have looked at A LOT of other producers and finally picked this ones for myself: https://www.manufactum.com/salt-pepper-mill-m-acker-a68020/ https://www.manufactum.com/salt-pepper-mill-m-acker-a68021/

I have not even started using them, so can’t say much about how well they work. I expect them to work normally - the mill assembly is actually a pre-built unit from a company specialising on mills, so I don’t expect any surprises there. Material-wise they’re going to hold up for several centuries for sure and they will age well. The mill grinders might need to be replaced after 10-15 years depending on use, but that will be the case with anything else. They definitely can take a beating from most mishaps during use and have very good repair potential. Design wise they’re unfortunately not perfect. The whole upper part is all solid stainless steel billet. An absolut unit, but unfortunately also quite heavy - this makes the mill easier to knock over because of the high center of mass. Then when it falls - it will damage whatever it falls on, rather than taking damage itself. Also the interface of the grinding body parts is just pure metal-on-metal. With clearance of course, but still - this could be improved.