This is the 40, 5 mm which saw the light a few years ago.
40, 5 mm big, 13, 2 mm high.
And a plain dial, which is, in my opinion, much nicer than these apertures we see on some versions.

Let's no forget that with the Duometres, the show is also on the back side...
The soleillé decoration of the german silver plates and bridges is just eye and light catching.
Best,
Nicolas