This gauge was originally fitted to a Fiat and is probably from the late 1920's or early 1930's. At that time a number of car makers used the sophisticated Nivex system.
This gauge is 50mm in diameter. The glass is chipped but otherwise it is believed to be in good condition.
Broken down. Not working. Could bake a working engine from the 2. Found in grandfathers / uncles garage along with large amount of other de Dion parts..