They sound good Ian, I don't know what they're worth but when I was in the Air cadets in the mid 70's all we did when we weren't marching up and down the yard was sit in the hut with silhouette aircraft recognition cards. I was quite good at it because I'd made lots of airfix planes. Unfortunately the cards weren't playing cards
Most of the ones I could find were much later than WW2...In fact I only found one WW2 item, a single pack of cards, not boxed, marked and dated as a set of 4....
However, it seems probable I won't have to pay too much to get them...Ian