Photo of Ar 240 CB+UV surfaced some time ago on ebay.
Judging from handwritten note on the back of one of the photos from the lot the location should be 'V.f.H. Gelände' so I presume Oranienburg.
Not certain if Stammkennz. CB+UV was previously mentioned in published sources. Best I could figure out this a/c could be Ar 240 V5 or V6 that indeed were evaluated by VfH coded T5+KH and MH. Overall camo, style of markings and the way spinners are painted (black/white) are similar.
Any thoughts?