I stand corrected... Gen I boxes did not have the protrusions on the center post to force the owner to store the weapon trigger back.
I admit to being too lazy to go to the shop and dig out my gen I box. My apologies!
Getting older my memory sometimes need jogging. Recalling more now about the gen I to gen II "tupperware" box. There were safety concerns voiced from I don't think I was told or heard... that thought it unsafe to be able to box the pistol loaded and with ammo stored in the box. It might have been increased sales in the US. The gen i box was replaced with the gen II "tupperware"
Gen I boxes are not common. Oh, my source. A number of Glock sponsored training classes, the national academy I rotated to as a guest firearms instructor, and the instructor (my friend) that was assigned to the academy who had a connection at the Glock factory in the mid 80s.
A funny story related to this. My buddy Charlie, I knew had a connection at the Glock factory. Charlie was a staff instructor at the Federal Law Enforcement Training Center at Glynco, GA. I needed a few Glock parts, including some restricted parts. I call Charlie and ask what he could do. He says he will work on it. About a week or so later I get a telephone call at work from Glock by a guy saying Charlie asked him to get in touch with me about the parts. I request the parts, the guy says "no problem" and I ask how much. He says no charge. The parts arrive quickly. A couple days later I am reading a magazine article in some gun rag about Glock Inc. I see the guys name in the article. The guy that called me and Carlies friend was the CEO of Glock. I called Charlie and said I knew he had a connection at Glock, but I had no idea how high it was. True story!