Here's a report made by Finnish ace Ilmari Juutilainen on 26th July 1943. The victory was not confirmed. A-20Gs were operated by the KBF at the time, but A-20G is hardly a seaplane!
1. Date: 26.7.43. 15.10 - 16.10.
2. Area and altitude: 5 km SW from Seiskari (Лесной), 1000 m.
3. Destroyed or damaged plane: A two-engined seaplane.
4. Where did the plane went down: 3 km SW from Seiskari between two little reefs, burning.
5. Description of the battle: I was patrolling near Seiskari when I spotted two-engined seaplane SW from the island at altitude of 1000 meters. I didn't notice any escort fighters so I attacked. My altitude was 2000 meters. I closed in from behind and below and then climbed to same altitude and opened fire (30 cannon and 120 machine gun shells). My plane slided and the fire hit the left side of the fuselage and the left engine which started burning. The plane went down to the place I descripted above with two men parachuting. The plane was very large, high-wing, wing attached to the fuselage and narrowing to the wingtip. Single tail, gunner behind the vertical stabilizers and a dorsal gun. The plane seemed to be fast, c. 400 - 450 km/h in vertical flight. I shot it close and got oil and plane parts straight to my plane. However my plane didn't got any damage from them. The wing tips were painted brownish yellow in length of c. 3-4 m.
6. Witnesses: The plane came from grid 119 ol, Ingria.
Own plane
Type and serial: MT-217
W.O Eino Ilmari Juutilainen