[keith A]

Thanks chaps. Unfortunately I don't have the excellent Prien volumes and neither does the National Library of Scotland so I can't do much in the way of research. I don't think he scored any victories with JG26 so anything other than the 56 claims (with 7 unconfirmed) gained while a pilot of JG53 seem unlikely given that there's no indication he flew with another fighter unit in WW2.