rbj69,
excellent job (if its a rep base you have moded)
For the history :
The original, the only one model with crown guards and the small gmt hand pointer, had in fact a calendar disk with red numbers. Some dials had circled dots, some not.
But lot of these vintages are canibalized with a mixt of various parts as dials, calendar disc, hands etc.
Where did you find the dial ??? I am looking since so long time to find a correct dial
here, the original 1675
Crown guards on yours are good, loock here details