Rexroth industrial and commercial compressed airline regulator from the estate of an industrial engineer. It is marked as model "PR7817-0010" and is also marked "1298". It is rated for inlet air preassure of 300 psi / 21 bar and operating air temperature of 175 deg F / 79 deg. C. It measures 7" high overall and the airlines are about 3/8" inside diameter.
