Russell,
I think photo posting from older threads naturally disappear after about 1 year or so. It has also happend over on Jan Still's gunboards, but that happened when the server crashed or was hacked.
Many folks know this and will plan to "clip & save" photos onto our hard disks any of the photos files that interest us. Our newer Members probably do not know this.
Here are two I saved from this previous discussion. They are photo scans from some of the Luger books discussed.
BTW...there has been no follow-up article in the NAPCA newsletter "AutoMag" since the first article that I started the discussion with...which became quite a lively "conversation" on the Luger Forum.
Also...if I recall...the kanji characters written on the length of the luger barrel are actually markings found on certain Japanese rifles.