It was, and still is, used on the planes and airforce planes in Finland.
It predated the Nazi Hakenkreuz ("hooked cross") which is forbidden on models anjd pictures in Germany today. (The replica first replica ME262 flew in Germany this year - see www.stormbirds.com )

Even though Finland turned to the Nazis for help from the Nazis after Stalin bombed Helsinki and then invaded Finland in 1939, when ALL of the allied forces turned a deaf ear to their cries for help. Finland recaptured its lost territory (sought nothing more than that), and Hitler visited Finnish President Mannerheim and presented him with a beautiful Mercedes 770K, but the Soviets forced an armistice upon the Finns in 1944 and forced them to drive out the German forces through Lappland, and give up 10% of their entire nation to Russia (mostly the land around Murmansk to get the nickel mines at Petsamo, and all of the Eastern Karelia territory to have more land around Leningrad)

Has nothing to do with the German National Socialist symbol though. Althouogh neither of them trusted the communists of Russia

But it did give me a jolt the first time I went into a hanger North of Helsinki and saw one (a blue one) on a plane

__________________
1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)