[schwarze-man]

After working on some preliminary sorting, I felt that I could see several number Blocks from the very start of the data, 7 June 1940. The Blocks are; 10xxx-19xxx, 20xxx-29xxx, 30xxx-39xxx and 60xxx-69xxx. As I mentioned previously, I considered the engine types commonly associated with the Bf109 type that was recorded with the engine number in the listing. The process is a little laborious. I started with the DB601A and found the following by taking the start of the block and the highest number in it for the DB601A:
1xxxx Block 1,829.
2xxxx Block 1,285.
3xxxx Block 1,282.
6xxxx Block 6,143.
This gave a Total DB601A range of Werk.Nr. of 10,539.
Next, I repeated this process for the DB601N. Result 2,998.
Then I completed the process for the DB601E. Result 5,943.
With the DB601E I found that the 7xxxx Block had come into use as the 6xxxx Block had all been used.
The overall total for DB601 numbering from evidence in the listing came to 19,480 engines. This compares very well with the post WW2 BIOS report listing of 19,180 DB601 engines total production. However, as I said earlier, the accuracy cannot be absolute but I think the close figures prove the basis of the Block engine numbering allocation of the DB601 series.
Working through the Block numbers against the BIOS report figures for individual production plants showed good relation to the analysis. The breakdown came out as follows:
10xxx-19xxx is Berlin Marienfelde.
20xxx-29xxx is Niedersachsische Brunswick.
30xxx-39xxx is Henschel Kassel.
60xxx-69xxx and 70xxx-79xxx is Genshagen (with almost 50% of production!). Cheers

SM

Just to note, I think it is worth pointing out that the number range of these Blocks used amounts to a possible 50,000 engine numbers but, the analysis using the listing data has produced a very close figure to another source of engine production figures totaling just over 19,000. I think this proves that the system of Werk.Nr. allocation is similar to my model.