Hello
Keppler was not in 12./JG 5, which was based in Bergen with Fw 190A and part of III./JG 5, this group was also called Eismeerjäger with its own groupemblem.
He was a part of 15./JG 5 at Lister? with Bf 109G which was part of IV./JG 5
Best
Olve Dybvig
www.luftwaffe.no