Dear Theo,
I picked up your question recently when researching x9639.
My Mothers cousin T Srzednicki was Navigator commanding the plane.
Many years back when we traced burial of the deceased crew to Reichwald War Cemetery near Kleve via the CWWGC we were informed the deceased crew were first buried in Dusseldorf North Cemetery.
I have copies of the squadron log registering the mission.
If you have any additional information regarding x9639 I would appreciate receipt so I can share with the family in Poland.{ I am aware of some confusion over identity of the Assam bomber].
From my old research I am also aware of some possible confusion on the identity of the tail gunner who was the 1 survivor.
Rgds Jurek