Isn’t this collar extremely nice?
To draft it, start from a basic blazer block.
Draw the raising collar on the front and back, then on the front add the shaped button stand and the curved style line starting from the neckline and ending into the pocket (where you can discard the dart).
Keep the same center back and side panel.
Trace the pieces separately: back, back collar, side panel, front panel, center front…and you’re done!