[Heatercathodeshort]

Just noticed this interesting thread. I have a number of old AVO meters collected over the years and I will list the serial numbers as they are discovered. My current bench AVO has been in use for many years bought second hand I guess around 30 or so years ago. The serial number is 5770-15-463. I'm not exactly sure what model this is, maybe someone could enlighten me? Another rather tatty meter is a 7 Mk 2 serial number 82947-A-1259. Pictures attached as we all love pictures. Regards, John.