Hi guys,
I think it is one of the Avia B.534s used by Germans as equipment of training squadrons or fighter pilot schools of A/B Schule type.Avia B.534s of The Slovakian Air Force had different national markings and yellow quick ID elements.Look at these profiles attached below.What is more, the number of the plane (37 - probably) seems to be yellow comparing to the white outline of the cross.The kind of marking can be seen in the profile of the German yellow six.