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ID = 67166
United States of America (USA)
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to 4631_WLS = WLS527 = C327
Similar Tubes
Normally replaceable-slightly different:
  N_CeCo ; UY227

Base UY-Base, 5 Pins (USA, April 1927)
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Specified voltage AC/DC

Page 671 of the Fall 1928 issue of the Sears Roebuck catalog lista the 4631 as a new tube, equivalent to the UY227. The company sold the standard range of US designed and made tubes and these were made by a few small manufacturers. The "WLS" (Worlds Largest Store) brand was either hot branded on the base of the tube or a paper label on the glass. The fall 1929 catalog has an entirely new catalog number and the 4631 became the 57T227.

Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 47 g / 1.66 oz
Information source Tube Lore (I)   page 16.
Sears, Roebuck Catalogs (Silvertone)   Page 671, Fall 1928 issue

27~~1.png 4631_WLS: Fin Stewart
Fin Stewart

Just Qvigstad

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