Check the WWII Today section or the one above it-look for a thread started by JulioMac-who posted many of my pics for me and there should be one pic of ione in there? I know I have at least one showing that artillery piece.
Are we talking about the 28 cm railway guns (Kurz Bruno, Neue Bruno, Schwere Bruno, Lange Bruno, etc.) ? There is a nice video here http://www.youtube.com/watch?v=nAxySDG_jjs but while the first images look like a Lange Bruno the last images are possibly a 210mm Lange Gustav.
I don't know much about the nuts and bolts of weapons, but check this site. It has 21 pages of photos. Possibly one is what you are looking for. World War 2 Photos - German Artillery
I'm really curious about this, can't find any info about it, can you provide some additional pointers like possible manufacturer, year of introduction etc? 288mm is pretty big for a field gun and not a usual caliber for Germany that AFAIK used 24cm, 30.5cm (skoda) and 35.5cm guns on field carriages, I think all 28cm guns had a rail carriage but I'm not sure.
According to a book I have the German 741, 742, 743 and 744 artillery batallions had nine Krupp 28cm WW1 vintage howitzers (modified for mechanical towing) at the siege of Sevastopol, are these the ones? Apparently six of them had burst thier barrels during the barrage and one was hit by counter-battery fire but they fired about 1000 rounds and the survivors were used at Warsaw in 1944. Kustenhaubize 28cm (original design as used at Verdun in WW1) View attachment 7595
