Ako pisal Franta, vzhladovy rozdiel nebol ziadny.
Dolezity detail na Kobre (okrem inych) - seriove cislo pod dverami, tj. povodne, je ine, ako je na smerovke, co potvrdzuje to, ze smerovka alebo aj kus zadnej casti bol vymeneny opraveny/posilneny.
Dovody na vymenu a posilnenie trupu:
1. "End of august 1943. Rechkalov was a bit unlucky. He hit "Ju-87", but when flying away from attacked plane, he pulled on the stick too much, very sharply and his "Cobra" deformed."
2. ...reinforced area, here done locally by Soviets in August 1944 (only latter Q versions were reinforced in Bell factory) - tj. na zaklade svojich skusenosti Sovieti zacali provizorne zosilovat/spevnovat zadne trupy Kobier a na zaklade toho to od nejskorej Q verzie zacal robit Bell priamo vo fabrike.
Viac na http://massimotessitori.altervista.org/sovietwarplanes/pages/lendlease/p-39/misos/rechkalov/rechkalov.htm
Preto ma smerovka a zadna cast trupu inu farbu, ako povodna Kobra.