This 1945-6 vintage O & R 23 ignition model airplane engine is in excellent plus condition. Compression is strong, lug holes circular, all head fins there, front bearing tight. Engine is quite clean, and seems to have very low time. The entire motor presents impressively, in a beautiful manner. Comes with the correct Champion spark plug. Serial no: 45879.This series of 23's was built from wartime 1945 to October 1946. Finish on the cylinder fins is smoother than the pre...vious O & R 23 wartime series. From a collector of ignition motors, who insisted on only the best, and maintained them with this in mind.Watch this space for many outstanding O & R Sparkies to come! Shipping and insured Priority in the US will be $13, and INSURED international sales welcome. Satisfaction guaranteed, with any issues worked out one on one. Due to the current health situation, USPS deliveries have in some cases been slower than usual. Please allow a bit more time. Thanks.