Straight from my own kitchen, and before that years ago from Paris, this is a c.1850-70 (Napoleon III era, mid-Victorian) French oil and vinegar, mouth-blown cobalt glass decanters with hand applied enamel. In French, of course, and in excellent condition throughout, the set is duplicated in the kitchen of my other house, too. I love these! The decanters are extra large, really. At 10" tall, and the stand is slightly over 12" tall as you see it. Makes a wonderful accent set even when not in use at your table. Other measurements are noted directly on the photos.
Very good to excellent condition for age and type. There is one smallish edge chip on inner tip of one stopper. That's it. No other flaws to note. The top cast metal handle is strong, and I use it to carry the caddy, full, so stand is also sturdy. The stand is all lathe turned except the flat rectangular base, and no chips or cracks on any of it, to include those 4 feet. A really superb set. I'm unsure of the maker of the glass, but it's probably LeGras. The enamel 'label' is thick impasto enamel.