Avo - MK8 Audio testing equipment

Avo MK8 Avo multimeter :

Country: United Kingdom (UK)
Manufacturer / Brand: AVO B.V.; London
Year: 1964
Category: Service or laboratory equipment
Technical specifications:
Power type and voltage: Dry batteries / 1.5 ; 15 Volts
Material: Metal housing
Form: Table model
Dimensions (WHD): 170 x 195 x 115 mm
Notes:
Copper oxide replaced by germanium rectifiers to improve AC sensitivity and frequency response (usually 20 kHz at 2.5 V).
Fuse added to low ohm ranges. Early Mk3 models do not include the extra safety features described below and shown on the schematic.
DC 2.5, 10, 25, 100, 250, 500, 1000, 2500 volts - sensitivity 50 µA
DC 0.05, 0.25, 1, 10, 100 mA, 1, 10 A
AC 2.5, 10, 25, 100, 250, 1000, 2500 volts -
sensitivity: 1 mA at 10+ volts, 10 mA at 2.5
AC 100 mA, 1, 2.5, 10 A
R 2 kΩ, 200 kΩ, 20 MΩ (20, 2 k, 200 k Ω center)
Also LR (= 0.325 volt, for use with the low range of the Resistance Range Extension unit) and Ins. (2 MΩ center, with external supply)
Net weight: 2.7 kg.

With 2 test leads and leather carrying case.
Working (see photos).