Perhaps we're talking about two different Curvex Cadets?
Mr. Kastner pointed us towards an image found in the Decade Series book, The 1940s on page 216 of a Curvex Cadet. Best I can tell, it's the ONLY image of this specific model of Curvex Cadet, advertised in 1947. That's the best feature of these Decade Series books, obscure models are often found only here.
As previously stated, not only are the cases a match, but so is the dial. I think it was a great ID.
The area I would like to direct your attention to is between the lugs. On the Cadet there is an "extra bit of metal" between the lugs. The Curvex Comet does not have this extra bit of metal.
I have highlighted these portions of the bezel in yellow on the original photo of the watch that was in the initial post.
Curvex 440 449 with overlay.jpg [ 204.24 KiB | Viewed 255 times ]
These highlighted areas on the bezel are not present in the Curvex Comet (on pages 186 and 210 of The 1940s book).