[schwarze-man]

Hi Dénes,
Well, the data of DB601, 603 and 605 engines in Bf 110 and Me 410 losses that was also generously supplied by Matti, covers some 140 engines of those types. However, only eight of those engines are 8-digit serial number DB605 engines and they all fall within the scope of my data above. The other 132-odd engines are earlier 5-digit serial numbered DB601 and DB605 engines. As I have commented, the 5-digit serial DB605 engines have presented difficulties with my earlier analysis, as the numbers (total of block numbers) seem to be far too large. However, I might revisit the DB605 5-digit serial number data again in future, if I can face it!
Pleasingly though, this analysis of the 8-digit serial numbered engines in the loss record data and the BIOS report is very satisfactory. To illustrate how it fits, the BIOS report shows approx 34,700 DB605 engines built in '43 + '44. The engines built in early 1943, before the 8-figure serials, were approx 4,000, that leaves approx 30,700. Then, there are the "other" plants production (from BIOS) that do not appear in the loss report data I have that total approx 6,700, therefore leaving approx 24,000 engines in the blocks that fall within the loss reports I have worked from. So, this fits with about 95% accuracy.
There are of course many details that nothing short of a complete detailed record of all production and exact types produced when and where could resolve, but that does not exist. The main omissions from my data include DB605 production at "other" plants which the BIOS report lists as "FIAT, Pommersche, Ostmark and Avia" The BIOS report does not mention Swedish production.
So, overall I am pleased with this work. It should allow anyone researching an RLM 8-digit DB605 engine serial number to find a cross reference with 80% success. X-referencing with the BIOS report should give an accurate production date, within about one-month accuracy.
It would be great to see further info about the "other" plants and a better understanding of the earlier 5-digit DB605 engine production is needed.

Cheers

SM

PS. I have since noticed that I have made an error in the BIOS production report. The "Pommersche, Ostmark and Avia" production is listed as just DB 603. This makes a difference of about 6,300 engines on my DB 605 figures. However, the figures above will be revised and updated. This also leaves a better situation in that, there are no known "other" DB 605 production plants, at least no others that show in the BIOS report.
Also, the Bf 110 G using the DB 605 B engines was built in about 3,250 examples during 1943 and 1944. These would have required about 6,500 DB 605 B engines, that came from the totals of DB 605 production.
I will revise the figures and I can see some further revision that can be applied due to my data on the DB 605 D production in the later part of 1944.