Hi Guys,
Obviously Goran is right; seems to be a He111.
Concerning the "Canister" I see it as a leather mail box with two seals (sort of).
Kurierstaffel??
for example: Kurierstaffel 110 did use He111 following that:
http://www.ww2.dk/air/misc/kur110.html
Tschüss, Franck.