Wireless receiving valve

Description

Wireless receiving valve, R type, marked B, made by Moorhead Laboratories of San Francisco, early 20th century

Museum reference

T.1931.115

Collection

Industry and Commerce : Communications

Object name

Wireless receiving valve

Production information

Moorhead, Wireless equipment maker
San Francisco, California, USA, North America

Date

Early 20th century

Materials

Brass, Glass

Physical description

Brass cap and pins