This is a somewhat longish post. I'm trying to accurately describe something which as far as I know hasn't yet been discussed in the collector's subforum. I was recently taking a closer look at some of my old Glock materials when I noticed what appeared to be a second rarer variation of the already incredibly rare 1st generation G19. This was on the back of my March 1988 (Form US004-03/08) factory manual. It was late that evening so I put the manual away and didn't think of it again until I saw the ongoing thread in the collector's club subforum pertaining to old Glock printed materials. I am away therefore don't have the manual nearby at this moment so I turned to finding listings on ebay and pictures on google of March 1988 Glock manuals. Looking at photos of the front and back covers of these manuals (also indicated as Form US004-03/08) I noticed several interesting things which differ from my manual: Although the form ID is identical to mine, a 2nd gen G17 is featured on the front. Again, although the form ID is identical to mine, the rear cover features all 2nd gen Glocks. See this cached snapshot of ebay listings of three separate March 1988 (Form US004-03/08) manuals. They are about ten listings down - https://webcache.googleusercontent.com/search?q=cache:XtNPF4X9SU0J:https://www.ebay.com/sch/GLOCK-Gun-Manuals/106973/bn_1969209/i.html?_fsrp=1+&cd=12&hl=en&ct=clnk&gl=us I thought I must've been mistaken regarding what I had seen on my manual, but fortunately I still have the email from the seller that sold me my March 1988 manual which included several pictures. I've attached them below. You'll notice several things - The front cover displays a 1st gen G17. This is despite the fact that my manual has the same form ID code as the others linked above which differ. The rear displays a 1st gen G17, 17L and 19. The really interesting part is that the 1st gen G19 on the rear cover which is in the 1st gen pebble finish texture does not appear to be made from a cut down G17 frame. I cannot recall such a 1st gen G19 having been discussed here previously, not have I ever seen another photo of one. I also have been unable to find another picture of a March 1988, Form US004-03/08 manual such as mine. I know the quality of the pics isn't great, once I get home I'll scan in higher resolution images if anyone is interested. Can anyone shed light on this? Is this some ultra-rare 1st gen G19 variation that Glock intended to put into production? Why else feature it on a factory manual?