This is a rare vintage NOS GM oil pressure gauge made by Ac Delco. The gauge has a blue line and features an analog display type. It comes with lines and fits various Chevy, Olds, and Buick models from the 1970s and 1980s. The needle is red and the unit of measure is psi. The part number is 1-6464740, which is also an OE/OEM part number. This gauge is a great addition to your classic car and a must-have for any vintage car enthusiast.