Mikee
Had several of these in the 60's, some girld did not like giving them upp
The one I gave to one gal had the same type of clasp, two short sides joined at the bottom with a stud and clip joiner.
Had the type that the spring clip slid into the head of the bracelet also makiing it look like no clasp.
I had one from high school, but lost it in the Colorado wildfire a few years back, along with everything else.
Ed