Westinghouse 1B32 spark gap tube. This measures 75x27mm. Also marked 532A. It is fairly heavy for its size. It is a T/R Cell but with no keep-alive electrode, and was used in the AN/TPS-2 radar circa 1946.

The box, not pictured here as it is hard to read, shows:

WL 1B32/532A
ACCEPTED OCTOBER 1944
CONTRACT W 28004 - 56 - 217 (hard to read)
902 - MPI - 44 (also hard to read)