McMillan, they were a good compressor, mine was a parallel twin Clisby. About 15 years ago my son took it back to Genco in Richmond where I bought it and told the bloke on the counter he had a compressor that was a warranty job. When he pulled the compressor out of the bag and put it on the counter the bloke nearly fell over saying they had discontinued that model compressor in 1964 and gone to the V-twin. Needless to say the warranty had expired about 35 years earlier