This starched collar is in a style so basic it might be from anywhere from 1890-1935, but it includes an interesting feature from which I will, with continued research, probably be able to “date” it more narrowly: The collar includes a stamp with a laundry directions to “IRON FRONT WITH ROLL” which following makes for an unusual top view.
As you can see the front section gets wider towards the front, which likely would make room for larger tie knots or the apparatus of a clip on tie. This feature is not part of the pattern of the sewn collar, but is part of the laundry starching process, (which any wearer might request as a special starching variation for any fold collar if that was the way they liked it) but the collar having the laundry preference stamped upon it is unusual, as is the example of having the collar survive with the starching style still intact on it.
You can make a collar pattern using these scans of the collar laid flat:
