They merged with Legras Glass in Pantin, France, in the 1920s. Collectors refer to the glass as Legras Mont Joye. Tall pieces like your vase with makers' marks are hard to come by.

Q — I own two pieces of black glass. The first is a large vase. The extended bulbous body ends in a flared ruffled top. The body features a wrapped ribbon sash motif with two large bubbles be… ...