Very good info Juha. Do you know is this balloon parts of the land forces or the aviation? By the way- nothing is changed from WW1- at that time balloon was also heavy protected by AA and fighters patrol and that was very daring mission to attack them. Just some time ago I have made one art for the project of the forthcoming book about Stephen Luke.
Thank you again and best regards
Srecko Bradic, Serbia [if my name mean anything...]