If all the images have the same size, it does not matter because in this case the sum of the means equals the mean of the sum.

I have a Longines heritage classic with the same dial layout. I think cutting out the 6 makes sense, it preserves the dial symmetry and gives an illusion of depth.

Removing this partial number would make the design cleaner and minimalist. This small change would make the watch modern. It is probably not wanted for a heritage and classic line.