I missed the middle of this thread with the picture request. I happened to take some tonight as I was emailing Fagor. My unit was made in 2/1993 according to the date on the bottom.
https://lh6.googleusercontent.com/-S...28HDR%2529.jpg
https://lh5.googleusercontent.com/-f...28HDR%2529.jpg
There are two settings, pushed on all the way to build pressure, and pulled up to the groove to relieve pressure without taking all the way off.
https://lh3.googleusercontent.com/-_...28HDR%2529.jpg
https://lh3.googleusercontent.com/-0...28HDR%2529.jpg
https://lh5.googleusercontent.com/-B...28HDR%2529.jpg
Prehaps the other side is adjustable? I believe that is the safety release though. It has four evenly spaced holes.
https://lh6.googleusercontent.com/-K...28HDR%2529.jpg