Do you have any profiles of the Czech birds?
1st Czech Air Regiment (1 CIAP ?)flew 11 very drab La5FN's in late 44 as part of a behind the lines incursion to Tri Duby. Not even a red/white/blue spinner. Czech air force only got La7's and La5FN's of there own after the war so be very carful when you see shots based at Tri Duby in hangers or one very long line of La7's and La5FN's.
The most famous for me (1CIAP bird) is white 13 due to its pilots previous history. Pilot Officer (an RAF rank) Pavel Kocfelda had previously flown Spit 5's in the RAF. he was able to report a direct comparison between the La5FN and the Spit 5.
Picture is also shown in the osprey book Lyric used above.