Ceramic bezel inserts aren’t silver like that, are they? It looks just like the Seiko SPB type that are anodised aluminium with some kind of high gloss clear layer on top.
Edit: having said that, it looks just like this one, which is supposedly ceramic:
Doesn’t a Sub have some kind of proprietary magic metal dust injected in the bezel indices to make them sparkly? Wonder if it’s a steinhart version of the above.
Ceramic bezel inserts aren’t silver like that, are they? It looks just like the Seiko SPB type that are anodised aluminium with some kind of high gloss clear layer on top.
Edit: having said that, it looks just like this one, which is supposedly ceramic:
https://youtu.be/xG69m8JaEIk