Great helmets! Maybe this is one of your guys?
An Oberleutnant as opposed to Leutnant but it's still a possibility. There's only 6 Von Windheim and only 2 v. Windheim, as in the helmet you posted, (If there's any real relevant difference and not just an abbreviation) registered by the Volksbund as fallen or missing and Alf v. Windheim is the only one to match with date and proximity (although I couldn't seem to locate Kissljakow via google maps...). Either something like that or he was lucky enough to survive
Nachname: v. Windheim
This bunker was in the village Novoalekseevka it inside Kessel, here Wikimapia - Let's describe the whole world!
Kissljakow village was near river Don. It's an old Cossack settlement, now it does not exist
here Wikimapia - Let's describe the whole world!
Aaaah... then I guess this might be another v. Windheim that is yet to be registered by the Volksbund. Were the remains identified through dogtags or other such pointers?
Also, interesting info on the settlement of Kissljakow... it's eerie how settlements and villages just disappear over such a relatively short time.
Didn't see this the first time around on the Grabersuche:
Alf v. Windheim is believed to have been transferred as an unknown soldier at the war cemetery Rossoshka.
Grave Location: probably among the unknowns
So perhaps this is the man after all, only with his actual remains only "recently" recovered. I'm guessing the info on the actual place he went missing/was killed per the Volksbund might be a bit iffy.
Either way it seems like v. Windheim is a relatively uncommon name so I guess there's a chance.
That's too bad and you're surely right... the helmet doesn't have to have anything to do with the remains..
Another great helmet --- love the color and the red dot! Relics with either camo or individual markings such as this are the most interesting to me, although I love them all.