7.7cm FK 96 n/A anti-aircraft gun
Contribution :
Bernard Plumier
WW1 artillery blog link
Location :
Belgium
Brussels
Musée Royal de l'Armée
Another unique equipment in that wonderful museum !
The centre of gravity of that mounting is probably rather high, and the stability far from perfect...
The 77 FK 96 n/A on the top of that scaffold looks usual