Comrade Harps, but with a twist - im creating the story with OTL images (this is not canon, unless he desires)
The single Breda Ba.29 bought to the IJA, mid-1930's.
Despite buying several Fiat BR.20 bombers (plus a single example of the Ba.29) and selling the rights for license production of both the G4M and A6M to Italy, Japan disliked the Italians aircrafts, as they were inferior to their own. Instead, their permitted Germany to shown their own designs, where they got the license to build their own Fw-187, Ju-88 (Ki-49) and He-100 (as J3H, known by the Allies as Herman)*, while buying single examples of the Bf-109E, Bf-110C and Ar-196L.
The Breda Ba.29 fighter itself, while obsolete by World War 2 standarts, was still in service by the Regia Aerounatica until 1943, but some would still be kept in use by te ANR as a trainer until the August ceasefire, in 1944.
*The Italians would also begin to license built German aircrafts as well, initially the He-112 (AR.100 – 80 built), later the He-100 (AR.101 – failed to gain orders), and finally the He-280 (AR.200). The more indigenous AR.102 and 105/6 were more successful in the Regia Aeronautica.
Link:
https://www.whatifmodellers.com/index.php?topic=38046.msg619760#msg619760
The single Ford Vikhr R in RAF service, prior to be painted in the No.1426 RAF Flight, mid-1943
After attempting to intercept a JBN bomber raid in Baku harbor, one Ford Vikhr R of the
Motherland Liberation Squadron of the Soviet Socialist Republics of TransCaucasia landed by accident in the British-occupied Iran in late May 1943, were both the aircraft and it's pilot were interned.
Due to fear of sabotage and the killing of it's pilot, both were send to Great Britain, were the aircraft was tested alongeside the other Axis aircrafts of the "Rafwaffe" and the Allied ones, while it's pilot talked about the life inside the Stalin's-lead SSRT.
After the incident, Stalin ordered that the entire personnel of the squadron should be purged, while their Vikhr's were replaced by their main competition, the TASA Product 17 (aka a unlicense reverse engineered Bf-109E).
Link:
https://www.whatifmodellers.com/index.php?topic=46714.msg849885#msg849885