This is the fuel gauge from a B-32 Dominator bomber from World War II. All B-32s were scrapped by the end of 1949, which likely means this is one of the last B-32 fuel gauges in existence, if not the last one. The gauge is in very good condition.
The Consolidated B-32 Dominator (Consolidated Model 34) was an American heavy strategic bomber built for United States Army Air Forces during World War II, which had the distinction of being the last Allied aircraft to be engaged in combat during World War II. It was developed by Consolidated Aircraft in parallel with the Boeing B-29 Superfortress as a fallback design should the B-29 prove unsuccessful. The B-32 only reached units in the Pacific during mid-1945, and subsequently saw only limited combat operations against Japanese targets before the end of the war. Most of the extant orders of the B-32 were canceled shortly thereafter and only 118 B-32 airframes of all types were built.
Description courtesy of Wikipedia.