We will never find “official” documentation on every TA produced simply due to the nature of the environment at that time. From Jan to May of 45, LW units were being destroyed quicker than they could be re-designated. Sometimes you need to sift through all the available information to come up with the most likely scenario during that time of utter chaos. All information I provided here are from the men who were there, and the books they have written. Reschke, Prien, Hermann, and Stemmer. Sometimes you really need to follow the careers of the pilots and in this case, Bruno Stolle in particular.
The first Ta 152 series aircraft left the production line at Cottbus was a batch of 20 pre-production Ta 152H-0s which were delivered in October and November of 1944 to Erprobungskommando Ta 152, commanded by Hauptmann Bruno Stolle and based at Rechlin, which would service test the airplane.
On 1 July 1943, Hauptmann Bruno Stolle was appointed Gruppenkommandeur of III./JG 2. He led the Gruppe until 7 December 1943 when he was relieved by Hauptmann Herbert Huppertz (72 victories, RK-EL, KIA 8 June 1944). On 20 December 1943 he scored his last victory. In February 1944, Stolle was transferred to Schiessschule der Luftwaffe at Vaerlöse in Denmark, where he undertook an instructing role until July 1944. In the middle of August 1944, he was transferred to Erprobungskommando Ta 152 at Rechlin. From October until 25 November he was acting Gruppenkomandeur I./JG 11, following which he returned to EKdo Ta 152 at Rechlin.
Stolle, while not only commanding the Erprobungskommando TA 152 was acting Kommandeur of JG/11 in between two assignments with 152’s. These men were close, and with replacements dying by the score every day and finding their units, designations, and assignments changing daily “things” outside of “official” channels were happening on a wholesale level.
JG 11 indeed had several Ta 152s in last weeks of war. But is was due to "procurement" skills of JG 11 personnel. It was not because of official instruction to equip the unit with this rare bird. Stab JG11 flew no combat but did loose 2 Hs on a transfer flight to Leck when engaged by Spitfires. Another crashed when landing.
See Prien/Rodeike´s JG1/JG11 book (third part) for details
