Here is a little used 17j model I found on the 'bay years ago.
A flawless ceramic dial. Sadly, it was found in an American PW Case. Oh well, here is a shot of the movement made in 1921:
It runs well, but not the most accurate. It needed an escape wheel, something which Zenith in the early 2000s was happy enough to give it to me gratis.
Cheers!
Dan