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ID = 81936
United States of America (USA)
Brand: Amperite Co., Inc.; Union City / West New York (NJ)
Tube type:  Relay in glass (not Relay Triode) 
Identical to 115NO20

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 115 Volts / No tube or solid state

Time delay relay

20 second time delay SPST  NO

115V, 2W heater.

115V at 3A A.C. contact ratings;

1500V D.C. max between contacts and heater.

Pin 2-3 heater; 5-7 contacts.

Information source - - Manufacturers Literature   
115NO20: My Collection
Bruce Morgenstern

More ...
115NO20: Allied Catalog 1963 Page 356
Bruce Morgenstern

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