GPO METER IN LEATHER CASE, 1960's

Test meter for GPO engineers with instructions for use. Very basic knob and terminals used with a variety of shunts. Marked on the front label (310506) 4 GPO TRA. 64/10. No more is known at present.

Your comments:

• I have one of these. I work for Openreach originally the Post Office. I joined in 1976. I found this when clearing somewhere out. It's labelled4 GPO G47/9 But is configured exactly like the one you have. Mine has the seperate leather case with the shunts to allow heavy current measurement
  .......... Alan Mortram, Norwich, England, 5th of May 2020
  
  

A1568