[WillAdams]

Interesting translation:

>A spin metal finish is applied to the rounding and decimal selector levers, giving them a unique brilliance.

Naturally, they mean that the levers were faced off on a lathe, then maintaining that center, machined to size/shape --- nice touch given how the chrome plated plastic buttons on my PRS-505 e-book reader wore down after years of use.

[Infernal]

If I’m not mistaken it appears the regular S100X has these too. The only difference really seems to be the lacquer finish, and maybe the navy display.