Luftwaffe Flak Units
 

Am I correct to think that Luftwaffe Flak units kept detailed records.
Do these records still exist and if so where are they kept?
My interest is in the Flak-Regiment 129 who I belive were based at Dunkirk in May 1944 and are most likley responsible for bringing down the 127 squadron pilot W/O Pearson on 30 May 1944. He disapeared on a shipping recee after encountering heavy flak from Dunkirk.