Nice find. We have a smaller cast iron fondue set as well. Ours isn't enamel though.
Almost all of our cast iron is enamel coated.
We do have some traditional cast iron skillets and things too, hard to beat cooking in cast iron of any type. Works on the stove top, in the oven, over a fire, and on the BBQ grill. The enamel coated stuff is just as easy to use, but you have to be a little bit careful not to crack the enamel so it can't be banged around, but it is still very durable.
Most of it is from the brand STAUB, which is made in France, and most of that is limited edition pieces or limited colors, etc. And for the most part it sits on a display shelf. We cook with it, regularly, so it's not just for display, but we have some favorites that get used more than others. Some of the smaller pieces have never been used because they are not vey practical in size for cooking.
It has become a tradition to give/get these as gifts. Many are not readily available in the US market so I shop the European and Asian markets and get them shipped it from a couple trusted sources. We have more than we need, obviously, but they are fun. And some are very seasonal and come out for various holidays.
Birthdays, mother's day, Christmas, anniversary gifts . . . pretty much a sure bet there will be a cast iron pot, pan, or baking dish somewhere covered with wrapping paper.