Hi Roland,
Yes, it will detail the end of the so-called
"Gefechtsverband Hogeback" and the adventures of the various pilots and their aircraft on May 8th.
I too originally saw a "13" in other unpublished images of the port side, but now think that the "1" appears to be a fuel stain, or, maybe an overpained "1" though this is not observed on the starboard side images. Certainly its original code - "B3+?H/K/L" - was covered up when it and the unit's other aircraft were assigned numeric 'fighter' codes. When I get home this evening (I am hanging around at work catching up on some things) I'll see if I can highlight the '3' on a photo and post here.
As previously announced, the JaPo series will start off with the KG and KG(J) units (Part 1), with Part 2 later detailing the JG and other units operating in the Protectorate. Part 1's artwork and aircraft descriptions have been completed and historical segment's text is now sitting on my desk for editing. Hopefully Tomas and Ales will have it in press later this year. I thus recommend visiting the JaPo website from time to time to follow the progress of this interesting project as well as others.
http://www.japo.eu/news.php
Cheers,
David