This is a 1920's vintage ship's altitude gauge made by H. BELFIELD CO., PHILADELPHIA for the VIRGINIA-CAROLINA SUPPLY,CO. NORFOLK AND RICHMOND as stated on the face of the gauge. The gauge was used to measure the height of water in tanks. The Virginia-Carolina Supply Co. was formed in 1921 and was active throughout that decade. They sold high grade plumbing fixtures, plumbers' and steamfitters' supplies. Retains an aged brass patina. A few minor dents in the casing. Measures 6.5" in diameter at the base with 4 1/2" glass face and 2" projection.