I have an older (15+ years old) version of this one: https://shop.hcsusasaddlery.com/hcs-usa-lunging-cavesson-lun210.html
AND one of the no longer available SRS styled ones that Dover sold for a few years.
This is the Dover/SRS cavesson with some supplemental fleece padding added. My horses have small cob heads, and Dover only sold “Horse” and “Oversize”. I had my leather worker shorten some pieces and use fleece padding to further help the fit.
One feature that sets both of these apart from many of the lunge cavessons is that there is no joint in the middle of the metal noseband piece so there is no nutcracker action on the bone. There are joints on each side, but not over the nose.
Both of them have well placed cheek straps to keep the cavesson from slipping into the horse’s eye.
I still use both routinely. Some of my horses prefer one over the other and there are some minor fitting differences so I’m glad to have two to choose from. The SRS/Dover one has beautiful leather and hardware. The Hastilow has held up well so far, but the metal on the rings is thinner than on other cavessons I’ve seen. The center ring is “slightly” bent/worn after 15+ years of regular use. I don’t know if the current model uses the same kind of metal hardware for the nosepiece as my older model does. Also the center ring doesn’t swivel. Here’s a close-up view: