A photo used by French collector Karoll when selling some lamps. Here we see three major categories of boiler: the fountain (1 and 4) standard boiler (2) and lavaboiler (3) The lavaboiler shown is a rare model. The fountain, no. 4, is the most common fountain, with three tiny nozzles for the liquid. The two on the left, made by someone called S. Vera (more info needed - another name seen on boilers is F. Vaudan, Paris) are very, very rare. One has a cool glass donut. The other has two fountains - for every few squirts of the lower fountain, pressure builds up to intermittently operate the upper, and another unique feature is the return pipe at left. All of these are on my boiler list, as are replicas of both the S. Vera label and the Fait Main ("hand made", seen on many boilers) label barely visible on the fountain No. 4's base.