Stern Radio Ltd.
115, Fleet Street, London EC4. (1947)
109 & 115, Fleet Street, London EC4. (1949)

Stern-Clyne Ltd.
3-5 Eden Grove London N7 (1963)
Branches in London and major cities throughout the UK.

Manufacturer & retailer and mail order service of domestic electronic equipment, components, amplifiers & tape recorders. Their products were frequently labeled "Stern's".

In 1963 the company went national opening retail outlets in London & major cities under the name Stern-Clyde Ltd.

Advertising in 1947 indicates the company had been in business for 25 years. [1]

They offered a range of wireless components in 1947 and by 1950 had added a comprehensive range of kits for home constructors which included Wireless World projects, test equipment, and the Televisor assembly. [2]

They advertised Mullard-designed kit set amplifiers and Mullard Stern Stereo designs in the late 1950s. [3]

In October 1963 Clyne Radio Ltd., Premier Radio, and Stern Radio Ltd., amalgamated under the name Stern-Clyne Ltd.  [4]

They opened a nationwide UK network of retail Electronic Centres in London, and regional cities with Bristol being their 7th outlet in November 1963.

The advertised amalgamation would make “Great Britain's Greatest Electronic Hobbies Organisation” and would;

• Mean a wider range of exclusive equipment available from one source, including our speciality-MULLARD DESIGNS-for the home constructor or ready assembled.
• Buying power means competitive prices.
• Offers the finest possible range of equipment and components by all leading manufacturers.
• Carry a comprehensive range of transistors, miniature components, and transistor radios.
• Retail shops, showrooms, and demonstration rooms throughout London and the provinces all carry extensive stocks.
• Hire Purchase facilities available on orders of £10 and over.
• Hi-Fi advisory service to help you in choosing the right equipment.
• Mail Order Service is geared to give prompt and efficient attention. 
• After-sales service complete satisfaction guaranteed. [5]

[1] Wireless World Aug 1947, Page Ad 47.
[2] Wireless World Nov 1950, Page 91.
[3] Wireless World Dec 1959, Page 137.
[4] Wireless World Sep 1963, Page 551.
[5] Wireless World Nov 1963, Page 81.