I'll give what I know off hand.
P-51B Mustang: First combat sorties in December, 1943.
Spitfire Mk IX (Merlin 61): June, 1942.
Spitfire Mk XIV: Squadron service in January, 1944 and first kill (Ju88) in March, 1944.
Mosquito Mk VI: July, 1943.
A6M5b Zero-Sen: March, 1944