AVO test set Multirange No 1

I bought another AVO today (can you have too many AVOs?) for £15 – including NATO case, leads and probes. About the right price really

I mention it here because on the side is a calibration label:

TEW REU RAF Henlow RAF F7129A

Date cal: 7 – 4 – 89
Next Cal: 7 – 4 – 90
Cal. by: I R Houston

It has a routine service label for December 1990 too

So, if you were at RAF Henlow between 1963 (when the meter was made) and 1990, I could have an old friend here

Richard