Western Electric Railroad Telegraph Relay mounted on its nice original  wood base. Your item is a “Main Line Telegraph Receiving Relay 150 Ohms Western Electric A RELAY is a signal controlled switch. When the coils are energized the armature connects two of the auxiliary contacts on the side of the base. When de-energized they are disconnected.

 
A RELAY is more sensitive to the small current that flows in the telegraph line than a Sounder and has a larger range of adjustment than a Main Line Sounder. The relay can be adjusted to compensate for changes in the line current caused by wet weather. Fewer RELAYS were made so they are harder to find than SOUNDERS or keys and usually bring a higher price.
 

Very clean and well taken care of compared to what you find out there. 150  Ohms. Both are stamped on the board. Western Electric is stamped on the metal tag and Made in The USA. Base is wood on nice metal piece.