Ya, I dont think they had yellow edges either, that was an RAF day fighter code.
On page 73 of "Spit V Aces" (Osprey) it shows a b/w photo of Spit Vbs in Iran in 1943 being handed over to the VVS, they have no yellow leading edges. Unfortunately, they photo does not show the upper wings, but I did find another source that stated the VVS would "paint over upper markings with matching colors" on lend lease a/c, so it seems they made sure the upper stars were either painted out or left off.
*My vote would be for "538" with the lightning bolt, no upper stars and the leading edges with no yellow*.
