From the research i have conducted it's most likely that Ltn Albert Deege flew on that fateful day on Fw Stöber usual a/c, the latter surviving the war while the formar is to this day still MIA.
Most probably the personal items found on the site belonged to Stöber who probably kept them in his a/c since they were at that time regularly moving from place to place.
I'm still waiting for confirmation that the wedding ring was not found on the corpse.