Old Cobra Ignition Model Airplane Engine Motor

A 1948 Air-O-Cobra .45 in new/near new condition with Champion V spark plug. There is no sign of carbon in the exhaust stack, but VERY light on the piston top. Additionally, no mounting marks on the right mount lug, but FAINT marks on the left (mounted for display?). No bent/broken fins or anything else. Please ask any questions BEFORE bidding.