Why would you buy a watch from them anyway? It's really lame business practise, but hardly surprising from a "luxury" brand. The good news is that there aren't proprietary electrons yet so if you can get something that fits and gives the right voltage you should be fine.
The good news is that there aren't proprietary electrons yet so if you can get something that fits and gives the right voltage you should be fine. The battery maker is under NDA, I'm sure Mont Blanc made sure you're not going to find something on AliExpress. And, yeah, I hate to blame the victim here, but who buys high-tech electronics from a maker of...fountain pens? (And maker of fine fragrances, too. sigh )
So I can see how this is a way of making a moat for themselves, it's just also a terrible way of doing so.