Looks like you already have the face plate off, so it’s a matter of removing the two or three tiny black flathead screws that secure it, and then gently prying the plate off from the right side (stronger than meter side). There is double sided adhesive holding it on. Sometimes with age, it separates easily and other times, it makes you work for it to keep from breaking it. Just go slow and careful. Once it is off, the old yellowed velum may still be attached or may be loose. I always remove it, clean off the old sticky adhesive and replace with new translucent 48# velum (Amazon). I use Thermoweb Super Tape, which is not backed tape, but just an adhesive on a removable tape backing. It acts like double sided tape and the 1/8” width is good for faceplates. Put the new velum on with Super Tape and then apply another layer to get the dial to adhere to the chassis. While the dial is off, the fuse bulbs are right there to pull and replace. I also replace the input indicator bulbs and dial pointer bulb with new LED’s while the dial is off, but it’s a more tedious job. If you want info on that, let me know
Steve
Link to the Super Tape:
https://www.amazon.com/Therm-Web-Double-Sided-Super-Tape/dp/B0018N6KOI