I had not seen that before. Very cool. One neat thing for me in looking at modern jeweler's benches is how certain design features remain the same. A ledge or ledges in the back to keep tools and other materials handy, raised edges on the sides to keep the work in front of you, and pull-out basins to catch droppings. Mine are made of tin, and I read they did that so that the jewelers could hear the "tink" when something dropped inside. Since it's been referred to so many times, I will link
my antique bench thread here.
I'm glad you posted those. I found very similar pliers a few years ago. They are unmarked, but it's good to know they are possibly manufactured by L. HUGONIOT-TISSOT, and if not, at least from within the same industry and tradition. The tolerance on those handle yokes or rings is very tight.
It requires some force to get them off and also back on.