#1: Sockelflak 76,2 L30 Author: Tichenor, Location: AntwerpPosted: Mon Jun 30, 2014 6:17 pm ---- Some more pictures of this gun Sockelflak 76,2 L30 by tichenor3698, on Flickr
More pictures here
The gun is Russian (Putolev), and rebuild by Krupp to be used by the Germans as AA defence gun.