You see that bunker waaaay over there?
Ja
I don't want to
Jawol!
*BANAGA*
*Sad bunker noises*
So during the Spanish civil war they found that the 88 is pretty good at putting 88mm holes in pretty much anything but it was a bit of a heavy sod to move about... so take one heavy half track, in this case an SdKfz 8, throw away all the wood, add a load of armour and an 88mm gun, Flak 18 in this case, and you have a crude but effective mobile 88. AKA 8.8 cm Flak 18 (Sfl.) auf Zugkraftwagen 12t, Bunkerflak or Bufla. They build 10 and they lasted to 1943. Other models followed using different half tracks.
Printing now...