Avometer Model 8 universal multimeter, manufactured by AVO Ltd., England. Robust portable analogue electrical test instruments designed for measuring A.C. and D.C. voltage, current, and resistance. The Model 8 was widely used by electricians, telecommunications engineers, and military technicians for servicing electrical equipment and field testing circuits. Known for accuracy and durability, these became a standard professional test meter. Mid to late 20th century, c.1950s–1970s.
