If it's redone, it's done very well. I think it's more likely the slate blue dial faded to grey, but one thing's for sure - that's the wrong chapter ring. It's from a silver dial model
Agree- Even the "blue" on the 1153N changed over time. The first models were a kind of anthracite..which on later models looked more blue in some light....but they were never a "true blue" like say the 1553N.
I'd say this is a 1153N dial that looks darker due to the angle/ light and the use of the wrong chapter ring