Skinner brass bodied solenoid valve, model R2D X10 and marked with code "CC1" It is rated for 120 volts AC, 5 to 200 psi and 10 watts. It is also marked as a 1/4" orifice. The ports measure about 5/8" over the peaks of the pipe threads. It measures about 3.5" x 3" x 2.5".
This valve is from the work shop of an old farm estate and we don't think that is has ever been used as it still has the plastic plugs inserted into the ports. We hooked it to power and can hear the solenoid click.