Mr Keppel wrote admiring the beauty of old tube testers and portable analysers – and if you have ever admired a Bakelite dial or (as above) an gauge with options for “Bad”, “Good” or “?” then you will be quite in heaven at the above page on the site of Mr Johnsons’s Antique Radios and Radio Schematics.  Reminding me in no small part of the (young mind scarring) visage of the machine at the start of Return to Oz, these are beautiful and terrifying boxed cacophonies of knobs and dials – all of mysterious use and dubious safety.  Admittedly a little late for us (generally 1920′s to 30′s or so) but so lovely I could not help myself.  Thank you, Mr Keppel.