This is a vintage truck tire type air pressure gauge marked "SCHRADER SERVICE TIRE GAUGE" on the exterior. It features the curved nech near the air inlets.  It measures 9" long and is in nice shape, most of the chrome plating has worn off, polished brass showing through. We did test this gauge on a modern valve stem, and it seals on the stem just fine, but doesn't seem to gauge correctly even though the air doesn't leak through it. Will make a nice display tool in an automotive shop, or for repair if you want to use it. It is rare to find one of these made by Schrader.