[Nick Beale]

John, Sterr's death is referred to in ULTRA, if that helps:

CX/MSS/T381/63 HP 8008
Source saw a tattered report, dated 27/11, No. 223(C% 4) from ACATO (((Roman) III./JG )) 54, Vörden, signed (B% Klimm), Hauptm. and Gruppe Kommandeur, stating that an a/c was shot down by enemy fighters over the A/F of Vörden in Oldenburg on 26th.
NOTE: III./JG 54 at Oldenburg on 8/11 (T362/119). In fact Vörden town is just outside.

CX/MSS/T382/19
Source has seen a document dated 27/11 dealing with death of Obltn. Sterr, Staffelkapitän, from (smudge) 54 Vörden, signed Klimm, Hptm. and Gruppenkommandeur.
NOTE: 1) It is not clear whether the word smudged was ACATO of ADABO, i.e. III. or IV. Klimm is however known to command III./JG 54, which Gruppe has already been reported at Vörden on 27/11 (T.381/63).

CX/MSS/T383/68
HP 8229
Fragment dated 26/11:
The following communication has been received from IV./ABIOG ((JG)) 54.
(C% Information) about the loss of Staffelkapitän and Knight’s Cross Holder (War Commission) Oblt. Heinz Sterr, 16. Staffel, shot down by an enemy fighter over own a/f Vörden … (rest torn away).
NOTE: See T381/54 giving similar information rather less detailed but locating III./JG 54 at Vörden. Present document is in fact another version of the document summarised in T382/19. Comparison of all three proved that ACATI ((III.) was used in error for ADABO ((IV.)) in T382/19.

Ref: 420 Further ref: CX/MSS/T383/68
TOO 301418Z/11/44
Further comment to HP 8229, no doubt whatever that previous report of 3rd Gruppe at Vörden was an error for 4th Gruppe as the dead pilot’s name in each case was the same and the 2nd report establishes him Staffelkapitän of 16th Staffel.