Vintage glass coffee maker pyrex chrome 8 cups Hellem circa 1950

A vacuum coffee maker for 8 cups, in pyrex glass, composed of two superimposed glass globes, a chrome and white porcelain support, a chrome support, an alcohol burner. The hellem brand (created in lyon in 1927 and marketed until 1978) In working order: a bit like an italian coffee maker, the water contained in the bottom container will rise along a pipe under the effect of pressure once brought to a boil. Period: circa 1950. Dimensions: height 39 cm, width 13 cm, depth 18 cm. Good condition. Ref adequantik 2303096.