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As war as I know, Y-gerät had two aerials, one after the cockpit and one after the dorsal gun position. X-gerät had three aerials, all after the dorsal gun, two close to it and one close to the fin.I see 1 antenne mast. Why do You think 'n its a y-gerat?
Where do you see on your post the antennes?
Ah. Could be i think.View attachment 649967
One antena, between the cockpit and the dorsal gunner. Normal He 111 had one after the dorsal blister.