The Sturmtiger in the background is a conversion from a Roco Tiger I. The resin Porsche Tiger is I think ArsenalM. It's a resin kit. The grey camouflage Tiger II is a Roco Minitank.Roco Tiger II in urban camouflage. The base is an interlocking floor mat. The pattern looked good as some kind of worn paving stones. The gray color looks good with bombed out buildings. Often in photos of bombed out cities everything seems gray and covered with dust.All the figures are 1/72nd scale Caesar Miniatures WII Germans, not sure which set.I found a model of the Bismark that is about 1/300th scale, maybe, and the turret fits perfectly on a Roco Tiger II. As the war continued and Allied bombers got larger and flew higher the Germans went from 88mm to 105mm to 128mm ant-aircraft guns. Those 128mm guns were used as anti-tank and indirect fire weapons also. They were even used as dual guns on the flak towers in Berlin. So this is a notional, 128mm twin flak / anti-tank / indirect fire self-propelled armored vehicle. Often in tank battles that side that fires first wins. So having the second shot already loaded and near to the target is an advantage.This and all of these are color photographs. The gray mat, gray
buildings, gray vehicles, and gray troops as well as the late in the day
lighting make it look black and white.You can see the matt colors of this tank show up in this light, but it did make everything look somber. Sometimes knowing when to take photos can make a different in the result.