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History of the manufacturer  

Stern & Stern (Concerton / Conserton), S&S; Stockholm

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Name: Stern & Stern (Concerton / Conserton), S&S; Stockholm    (S)  
Abbreviation: stern-ster
Products: Model types

AB Stern & Stern, Kungsträdgårdsgatan 19, Stockholm (1923)

Brands: Concerton, Conserton.

Stern & Stern in Stockholm was founded 1922 and from late 1930s on was owned by Philips Sweden.

They used the brand Concerton from 1927, and spelling was changed to Conserton in 1957 due to pronunciation issues (see this forum article).

A subsidiary in Belgium (Stern & Stern Radio Suédois) exists in 1933, with their own production probably commencing from 1939 onwards (unverified).

Founded: 1922

Some models:
Country Year Name 1st Tube Notes
27 Concerton II (2) [output Triode] A409  This is the first radio from Stern & Stern and the first "Concerton". 
53/54 Concerton V1524 ECH42  Dial lamp: 8045D 6.3V 0.32A 
50 Concerton B504    
30 Concerton L33 RE074  According to the add from April 1930 Stern & Stern has been an exporter - at least to Belg... 
62 Conserton B1821T    
62 Conserton B1920T Ch= T8A OC171  Transformerless output using both OC74 as quasi complementary amplifier stage, 12Ω speake... 
39 Concerton B50 KCH1   
45–55 Concerton V446 ECH3  separater Ein/Aus-Schalter an der linker Seitenwand. 
49 Concerton V550    
64 Conserton Puck V445 ECC85  Diodes: 2× OA79, BA102. 
65 Lady VG546 ECC85  Diodes: 2× OA79, BA102. 
64 Conserton Kim V545 ECC85  Diodes: 2× OA79, BA102. 


Further details for this manufacturer by the members (rmfiorg):

Stammhaus der Stern & Stern AB in Stockholm zum Zeitpunkt der Gründung 1922tbn_sternstern.jpg
Enblem der Firma Stern & Stern als königlicher Hoflieferant. Nur königliche Hoflieferanten durften eine Krone in ihrem Emblem verwenden.tbn_ssplakette.jpg
Emblem der Firma Stern& Stern.tbn_sternstern1.jpg
Firmen logo "Stern & Stern (cca1929)tbn_logo_stern_a_stern.jpg