Another member built this for me-he had quite a bit of experience with 3646 Calis.
I did talk with Marlin- but wasn't willing as he felt there wasn't a "good enough" case & dial- can't remember exactly....
It has a Dow dial (j did some research on this) it's a brass dial with the "train-tracks" around the circumference of the dial being the brass showing through after the dial is given a black gloss treatment & then the numerals are hand lumed with heat treated hands to match. At one point we almost went with a SWISS 6497 with CDG finish- but decided against it.
So he reworked the movement with the best parts from a few movements & re-worked the bridges....
It's pretty sweet...the line too is great.