Oberfeldwebel, listed with 7 victories in the Ring/Girbig JG 27 history - 5 vics with JG 27..survived the war, was still alive when Ring produced his book
some details of his victories as I just happened to be preparing a piece on I./JG 27 for my site..
..
I./JG 27 departed Africa for Sicily in November 1942, staged via Germany to Evreux in north-western France, subordinated to JG2 & JG26
14 April 1943 - I. Gruppe shifted to Poix - 4th victory - Walrus W2772 (277 Squadron) off the Dieppe coast (claimed as a 'Stranraer')
15 May 1943 - 5th victory - a Spitfire escorting Bostons raiding Poix
15 July 1943 - 6th victory - a Spitfire Mk IX of 322 Squadron again escorting Bostons raiding Poix...
end July 43 3./JG 27 moved to the south of France (Marignane- MRS) and then back to Germany (Münster-Hansdorf)
there's a nice article on I./JG 27 in France in Avions No 116 - back issues at
http://www.avionsbateaux.com