You can call Steve at Pinball Resource, but it’s hard to get through on Monday’s as he doesn’t have call holding.

If I recall correctly, this meter was printed on coated card stock. Does it have a sheen at all? If so, you should be able to polish away any soiling on the surface (gently!) with some Novus 2. This trick also works on score/instruction cards from Gottlieb. You just have to avoid polishing near the edges and any creases, where exposed paper fiber will absorb the Novus and soiling.

As a last resort, this artwork should be relatively easy to recreate with 11x17 card stock and a laser printer. I’m pretty handy in Adobe Illustrator and could design it for you.

I thought it was a fabric ribbon.

Not sure what washing would do to it.

I found someone online that had recreated this. They emailed it to me and I had it printed onto sticker paper or card I forget. If you PM me your email I will send the recreated image to you and you can replace the one in your machine. I also have made a ribbon and replaced it on my machine.

I made a thermometer for Heat Wave using spring steel. Is the C37 one spring steel too? https://pinside.com/pinball/forum/topic/heat-wave-thermometer-anyone-made-a-new-one