...I think the "flag" is more likely to be the Mylar shade hanging down from the rendezvous window above the Commander's station. The checklist taped to the left wall behind Armstrong in the post-EVA picture doesn't seem to be in quite the right position.
I wouldn't be surprised if that was right. Had my own little doubt about the checklist, but know very little about the geometry of the LM in that area and thought the ALSJ guys would have known their stuff. The perspective of the edges of the "flag" seems about right to me for the checklist, but I doubted the position and thought that perhaps the writing and the tape should show a little. However, unlike some HBs, I don't butt in and rave about something I know little about.
If you can show the ALSJ guys the evidence, please do. They want it to be accurate, and can't know everything. Through Eric Jones gratefully thanking me for notifying him about a few minor typos, we've had some great chats. I sent him some stuff about Captain James Cook and he sold me the early CD-ROM copy of the ALSJ for peanuts. I've since bought the DVD version, but the CD version, plus my own experience numbering negatives with indian ink in the 1970s, was the only one that solved one HB query about "studio lights" due to its early scans of Apollo lunar photos.
I sent Eric the names of the Playmates in the Apollo 12 lunar checklists,
http://apollohoax.proboards.com/index.cgi?board=apollo&action=display&thread=1345&page=1but he was well behind doing updates at the time. Anyway, it turned out that he beat me by two years when first reading Playboy in the 1960s.
I don't recall ever seeing those circuit-breakers behind Armstrong in the photo, or the shade you speak of. Fred Haise took some good film or video images near the CDR's area of the Apollo 13 LM, so I must look at the little of what I have again.
Even the Tom Hanks movie might help, although I cringe over the wrong moon phase for Apollo 11 (same as in
The Dish), the Saturn V's ignition at zero in the countdown (repeated in
From the Earth to the Moon), the mention of seeing Tsiolkovsky followed almost instantly by Fra Mauro, and I think they also showed the CSM and LM going in the wrong direction close to Taurus-Littrow. Yuck! It would be nice to see a movie about Apollo that's 95% accurate or better.
You obviously know a bit about perspective too. I've often been amused at how spacious the interiors of the LMs and CMs look in the video, but they're filmed with very wide-angle lenses so look a lot less like roomy telephone boxes or Volkswagens. That's probably why one of the HBs at the old board said something about one of the Apollo 11 guys floating "all the way across command module" in the vicinity of the couches. What???