2GB's 1 KW spark transmitter, vintage 1920, 60 cycle synchronous.
Also is a photo of a very nice collection of tubes.

Both pictures are of the Antique Wireless Assn. Museum, in Rochester, NY, George Patterson W2GB President, Bruce Kelly W2ICE Curator.

Photos from Don Chesser W4KVX DX Bulletin #8, July 25, 1957.
Photos by W2AXR