Great thread guys! Somehow I missed it till now...
Here is a profile of Avia B-534 "White S-13" of so-called Combined Squadron (Kombinovana letka), which Slovak Insurgents used against the Germans in fall 1944. This plane flew without cockpit conopy. It retained yellow identification markings of former Slovak Air Arm (Slovenske Vzdušne Zbrane), but original national insignia was over painted with insurgent insignia...
Profile from book "Slovenske letectvo 1944-45" Volume 3, artists Z. Valka and F.Valek