More bakelite and leather. Found these old GE AP-9 and DP-9 meters at an antique radio show over the weekend. Do they count as "multimeters" if you keep them together? Notice on the AC meter, the non-linear scale optimizes resolution for the mid range. It's logarithmic below and compressed above. How they do that?
The seller told me that they were used as calibration references for Simpsons in a production environment, which sounds a little far-fetched, but it's a good story. The calibration stickers are dated 1997, and both meters tested well.