I would have sent this further follow up off line as it is not particularly model related, but you didn't leave a e mail address.
From the following site comes the segment below:
"A rather improbable legend has been built around Zaitsev and his exploits. The publicity arising from his shooting skills allegedly prompted the Germans to send a Super-sniper of their own to kill him. By some accounts, this man was a Major named Koenig. By others, an SS Obersturmbannfuehrer by the name of Heinz Thorwald. In either event, a classic 3 day duel between Zaitsev and his opponent results in the same outcome. Zaitsev puts a bullet between the Germans eyes, killing him instantly.
This story does not seem to be supported by either German or Soviet archives. Reports concerning sniper actions by the 62nd Army contain no mention of this classic legend. German muster rolls of the Wehrmacht and SS reveal no officer by the name of Koenig or Thorwald posted to Stalingrad. In all probability, this account was a fabrication of some apparatchik in the Soviet propaganda bureau. Zaitsev did single-handedly shoot well over 140 German soldiers before his career was ended by the explosion of a land mine in Jan. of 1943, which permanently blinded him."
(My words again)
While the sniper Zaitsev was undoubtly a bit of a legend, the validity of the duel story has to be taken with a grain of salt. Especially remembering the critical nature of the Stalingrad battle and the efforts to defend at all costs.
Certainly such an event would have made it's way through the Soviet or German chain of command. Or even in the diaries or soldiers serving in the battle.
Potentially even a Soviet recollection may be more biased towards events described from newspapers and their moral raising(sic) political officers. The lack of any evidence from the German side (normally very thorough) in terms of movement orders or even scuttle butt(rumour/ propaganda) for anybody resembling a counter sniper has to raise more than a few questions. Even the debrief of German officers captured at Stalingrad failed to raise anything relating to this issue, aside from info derived from Soviet sources.
Many aspects of combat and indeed history are written by the victor, but does that make them correct? But hey at the end of the day evidence may surface that will prove me totally wrong.
I hope this helps a bit more Chris & Christopher.