A good machinist would be able to increase the diameter of the dial seat beneath the rehaut, so you have to remove less from the dial. And years ago member Donerix did a tutorial on modifying a dial opening to enlarge it, by sanding back the rehaut. Those together plus some judicious sanding, ought to get that dial to fit.
But if you mount the dial to an ETA movement with dots (after cutting off the feet) you might need to machine the dial seat anyway to reduce the stem height. You can do both at the same time.
Compare the post sizes for 1570/1520/1530/1560 movements vs. ETA and you might find a little broaching or staking will make them work. I did that for my Big Gonzo, the only real problem was the amount that had to come off the hours hand. Machining down the hands seat on the hours wheel helped.
There's more than one road to Rome..............