I added this Lapp 9" diameter fog suspension to my collection display by utilizing a ball & socket to clevis connector and suspending it under an OB fog unit. Acquired at the Springfield show in 2008, the Lapp required extensive cleaning of surface contaminants from the porcelain and the elimination of surface rust from the metal cap. Unit is under-glaze marked LAPP 25000 on one side of the top surface and 1962 on the other.