Hi Everyone, I have a very old IR two stage compressor that under several layers of paint I have to be a Type 30. I need to order a gasket kit for it but the suppliers want a type number which I haven't got. All that is on the plate is (I think) the piston sizes of 5&3 x 3 1/2 and a serial number of 40425. It's running a 5.5kw single phase motor, if it helps. The only other thing I can find are some test dates stamped into the receiver from November 1949. Many thanks in advance.