And now for something completely... ON TOPIC!!!
.... a Canadian manufacture Simpson 635 20K/VDC-3K/VAC model ....
....The meter movement appears nice & limber.
Nice!
My collection has a UK military Avometer 8 (with tropicalisation for use in the Colonies and extra metal case around the Bakelite, good for shielding and squaddie protection), and a Hartmann & Braun Elavi, but is missing a Simpson. I actually use them, mostly for current. Having a 5KV range of course is potentially (pun intended!) useful, even if it requires a very careful setup and hard thinking about Consequences.
Their limitations as to AC frequency and the loading of DUT inherent in a passive design makes one appreciate the more modern meters in the collection, like the 1968 Marconi VTVM and the 427A so much more ;-). Then, of course, if the passive volt meter says there are so and so many volts, we can be fairly certain we're not measuring ripple through a triac or a high-impedance sense circuit, but actual ommph that won't sag. That is a good indication in itself, especially if compared to what a more sensitive meter indicates.
Once I get hold of some voltage and resistance standards that are more standards than "standards" (for sensible values of) I'll go through and get a better picture of their inaccuracies.