Once you discover the possibilities of this combination you really go to another level.
It does not seem like such a big deal but when you start to compare specimens and you have dull and glossy gilt you can see the difference right away.
Matt dials are in a class to themselves so I am not comparing the two.
The period in question probably only runs from very early 60's to about the mid 60's 66/67 max where the glossy dial was really perfected. The sweet spot being 61-63.
Bill