I have recently aquired some additional 12 size RR style dials. In a way they are a paradox as 12 size watches with these types of dials were often hard to read .
The first three dials were "Montgomery" syle. I also have a 12 size Elgin with a similar dial

Here are two other 12 size styles.
The one on the left is suppose to be in a "Canadian" style and the other is a 12 size Rockford "Ferguson"
Bob