[schwarze-man]

To continue, Looking at just the first 15 entries in the listing for the DB601A for instance shows engines with numbers in Blocks 1xxxx, 2xxxx, 3xxxx and 6xxxx, all the DB601A Block numbers with listings in fact. The low xxxx Block seems strange. This xxxx Block might have included the DB600 production which was mainly at Berlin Marienfelde (Werk 90) with 1,184 engines and Genshagen with 690 engines according to BIOS. This would still leave approx 8,000 available numbers in the xxxx Block. However, these sub 1xxxx numbers hardly appear, I can only see two possibles in this Bf109 listing, one of those is a repeat of the A/C number (7184) and probably an error, the other (2179) is shown as a DB601N which have no other low numbers but, there are many DB601N examples in the Block 2xxxx such as 21705 and so 2179 might be an error. Also, in the Bf110/Me410 listing there is 1295 and 6882. Now, 1295 should fall in the DB600 production (just 1,874 engines). I have seen a crashed DB601A which was built with DB600 cylinderblocks. I have no better info on these sub 1xxxx numbers. The listing is almost devoid of them, whereas it should have a reasonable number. I suspect that the DB600 was built in the easy days of just 4 figure numbering of the DB600 in just two factories and so engine numbering was simple. The multiple Block system of engine numbers allocated to individual factories would seem logical and could have been introduced with the changeover to the DB601 production. It should be realised that the engine numbering was a considerable production workload and administrative task. The engine numbers were stamped and etched onto almost all engine components. Overall, I want to see if I can correlate the number samples from the listing with engine production numbers and, possibly, production factory.
Cheers

SM