Finland bought 35 Fiat G.50's in total from Italy in 1930-'40. Germany hindered the transit of the aircraft so that the first G.50's didnt get to the Finnish squadrons until late february 1940. Despite of this, during the Winter War the pilots managed to shoot down 11 enemy aircrafts losing only 2 of the Fiats.(other one of them in accident)

In the Continuation War(1941-1944) the Finnish Fiat G.50 shot down 88 Soviet aircrafts with own losses of 20(from which 9 for Anti-Aircraft fire or for non-combat causes)

The most successful Finnish Fiat G.50 fighter pilots were: 
O. Tuominen (23)
O. Puhakka (11) 
N. Trontti (6)

Finnish pilot with his Fiat G.50

Warrant Officer Oiva Tuominen(1908-1976) the Knight of the Mannerheim Cross #6, Finnish airforce ace with 44 aerial victories in total. He's the top scoring Fiat G.50 pilot with 23 kills and also the top scoring Finnish biplane ace with 6.5 kills in the Winter War flying Gloster Gladiator Mk.II

The top scoring Fiat G.50 pilot

Finnish soldiers in a machinegun nest during the Winter War. 1939-1940