u/BedOk3082

https://preview.redd.it/6cwukjnz55zg1.jpg?width=1944&format=pjpg&auto=webp&s=2b602cb788927f53b1ddd7cc5ee1a294faf3f1bb

I received this second-hand bracelet with the class barrel clasp. It is the first time I've seen a crown above the letter O that looks like this. Please help!
I couldn't find any mark in the barrel either.