Reference for Shabbat 122:1

בשיר ובטבעת ויצא בו ברשות הרבים משום מראית העין

with a ring or a bracelet and go out therewith into the street, for appearances sake.<span class="x" onmousemove="('comment',' If secured with a ring or a bracelet it looks like being worn as an ornament, which it is not, and it would be forbidden to wear it as such. ');">¹</span>

Jastrow