Cosmos

Valve List

Short Path Valves Advert. •Punch •December 22, 1926.

RC Unit Advert. •Wireless World •May 11, 1927.

SP-18RR & SP18 Advert. •Wireless World •May 25, 1927.

DE11, SP18B, SP18G, SP18RR, SP16R, A45, SP50B, DE50, AC/G & AC/R Advert. •Wireless World •October 5, 1927.

Met-Vick Four Advert. •Wireless World •January 4, 1928.

Met-Vick Components Advert. •Wireless World •February 22, 1928.

AC Valves Advert. •The Wireless Constructor •May, 1928.

SP16G Advert. •Wireless World •July 18, 1928.

SP Range Advert. •The Wireless Constructor •July, 1928.

AC Valves Advert. •The Wireless Constructor •August, 1928.

SP16R Advert. •The Wireless Constructor •September, 1928.

Met-Vick AC/G & AC/R Advert. •Wireless World •September 19, 1928.

Two Volt Valves Advert. •The Wireless Constructor •October, 1928.

Met-Vick AC Valves Advert. •Wireless World •November 28, 1928.

Met-Vick AC/G & AC/R Advert. •Wireless World •December 19, 1928.

Range Advert. •The Wireless Constructor •April, 1929.

A45

SP55R