Vintage, 1945, AMP Meter For Radio Frequencies, England

Description

Selling as found in the East Midlands of England.  Face says "AMPHERES"  Needle goes from 0 to 5.  Lower left says  "Thermocouple 1945 Made in England."  Lower right reads "A.P. 7208 res.067.n"  Weighs 5.2 ounces.  Diameter is 2.5 inches.  Back has white ink printing "F186478."  Inside back circle, the best I can read is F.LV? H.666"