This starched collar is in a style so basic it might be from anywhere from 1890-1935, but it includes an interesting starching feature and unusual “Idewyn” name from which it was possible 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.
Front with roll 
Stamp on the collar 
Front with roll 
Front with roll 
Front with roll 
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.
https://www.newspapers.com/clip/58244511/1922-idewyn-collar-ad-roll-front/
