Hi All.
Please see copy of letter sent to me by Ron Ferguson, whom I thank a lot for the information.
Maybe this can generate new information / thoughts from you all on this forum!
Dear Kim,
After close assessment of ULTRA decrypts CX/MSS/R309(A)para44 and CX/MSS/R325A/12 and other relevant material I am convinced that the following connections exist between Werknummern and Stammkennzeichen: -
He 219 Werknummer
Stammkennzeichen
190227
GU+BO
190228
GU+BP
CX/MSS/R325A
190229
GU+BQ
190230
GU+BR
190231
GU+BS
190232
GU+BT
CX/MSS/R309(A)
CX/MSS/R325A
190233
GU+BU
190234
GU+BV
190235
GU+BW
You may notice that the LEMB Stammkennzeichen database (website) already contains entries for GU+BQ (Gotha Go 145) and GU+BW (Fw 44). These entries are incorrect and should in fact be CU+BQ and CU+BW.
The Stkz GU+BT is reported as an arrival at I./NJG 1 on 13 Sept 1944. Until now, it has not been possible to link this to a Werknummer. The date 13 Sept 1944 matches very closely with the dates on Werknummern 190229 and 190233, sourced from CX/MSS/R325A/12. A number of the A-0 machines in this Werknummern ‘batch’ were affected by the bombing of the Schwechat assembly plant 26 June 1944 when it was attacked by the US 15th AF. Some He 219s were destroyed and some (e.g., 190229, 190233 and GU+BT) were almost certainly damaged, repaired and pressed into service in September as per the dates indicated in the ULTRA decrypts.
This means that the Stammkennzeichen GU+Bx series was “split”. (GU+B)B to N is linked with 190175 to 190187. Interposed between GU+BN and GU+BO is a completely different Stammkennzeichen series; the BE+Jx series. Effectively, the GU+Bx series “bookends” the BE+Jx series (an interesting curiosity!)
And - just in case the question arises re GU+BA Werknummer - it's 190131 (an earlier Werknummer batch)
Best regards,
Ron Ferguson
Author, The Heinkel He 219 Research Paper
Sincerely,
Kim Christiansen