Interesting, I just went to Jewelry and Watch and Phong is building te 6541 Milgauss!
http://www.jewelryandwatch.com/index1.html
Send him a 1030 thru 1080 movement and he'll do the rest for $5500!
Don't know if he has the magnetic flux cover though.
But since the movement was frozen, Zig, I can't figure this as a franken, except the dial. And the bezel could be procured from Michael Young or Phong, for that matter it should be the same as a 5508 bezel, since they both take the same crystal. 5508 dates from 1958 but had a 1530 movement which had just come out at that point.