Messerschmitt W.Nr.

[srob48]

Hi,
I recently brought a excellent book called "Messerschmitt Bf 109 E" by Robert Peczkowski and published by MMP Books.

In the book, page.61 is a list of Bf 109E Construction Numbers (W.Nr.).

I will be honest, I have no idea how the W.Nr. system works!

For instance, Quote: W.Nr.2789 - 2806. Version E-4. Number produced 18. Factory Messerschmitt.
Ok, I understand that. But the next line is:
W.Nr.2941 - 2964. Version E-1. Number produced 24. Factory Arado.

Question 1: What was the 133 aircraft built between W.Nr.2807 - 2940?

Question 2: Did other Messerschmitt aircraft, ie. Bf108 W.Nr. fit in with these numbers, or did they have their own W.Nr. For example, was it possible for there to be a Bf109E-4 W.Nr.2790 and a Bf108 with the same W.Nr.?

Question 3: In an ideal world, it would seem logical that once the Bf109F began production, it would follow on from the last Bf109E. But we know Mölders flew Bf109 F-1, W.Nr.5628. And yet if we look at the list, we find another 686 Bf109E of various versions were built after the Bf109F began production (including E-1) from W.Nr.5791 which was a E-4/B, upto W.Nr.7696 which was a E-7.

Sorry for my ignorance, I just hope someone can make it all make sense!

Steve