The Yahoo Slide Rule group issued an item: How do you display your slide rules. At that time I was thinking already how to display them myself and found this solution.
At a local DIY shop I found a piece of grooved MDF wood that I put in an Ikea frame (in The Netherlands it is called a Ribba frame) sized 50x70 cm.
I took out the inner board and replaced it by the MDF wood. Then I screwed in some wood to secure it at the backplate. The screen is attached to the frame with hinges. Unfortunately this screen is shiny, not matted.
In the grooves I inserted 2.5 cm pieces of a grooved stairway strip with the small side up. This will hold the slide rule in place. It is also thick enough, so that it sits in there very tight. I holds the heaviest rule I own.
With this grooved wood it is possible to display the rules at any location you like.,