I have a cheap sterling silver Tiffany charm bracelet that DBF (who became DH) bought for me in Japan. Its a toggle one.
We like to travel overseas - gone overseas 4 times in about 3 years (that sounds fancy but we really aren't!) and every time we travel he buys me a charm at Tiffany's to remember our holiday.
So even though I know my charms are worthless monetary wise- I love them and I would never swap or sell them
My grandfather did the same thing for my mom when she was a child! He travelled quite a bit for work, and would buy her a gold charm (back when gold was cheap), from many of the places he went. He matched them thematically too (i.e. big ben for England, Nefertiti bust for Egypt, etc). She still has it tucked away in her jewelry box. It is really a sentimental concept.