I love it!
Points of interest... no .40cal’s exist in this catalog and no 10mm yet either. And no Novak lo-mount rear sights.
Also another easter egg: that crazy .45 magazine that wasn’t yet the evolution of the design, but rather a 645 magazine with an odd hard rubber block/pad glued to the floor plate!
3900 series “the slimmer,
lighter-weight full size 9mm”
Ha!

As the owner (and lover) of a pair of 3906’s, these tanks are a half-ounce lighter than the double stack counterparts.
Slimmer no doubt, but lighter? The difference is about equal to a single round of 9mm. And indeed — at 8+1 capacity versus 14+1 (soon enough, 15+1) each fully loaded is a more noticeable difference. But as to the pistols themselves, put it this way. A 5906 with 8 rounds of ammo left in it weighs almost exactly the same as a 3906 with 8+1 in it.
Serial numbers: all the pictured guns are TBW or TBY serial prefix...
everyone! Run to your safe and see if you own one of these!

Guess I might have thought we would see “AIP” in such a catalog or brochure, but nope.
All in all, this is a pretty neat old relic. Thanks for sharing!