[Ron Ramirez]

The original speaker used in al Model 60 sets was the S-7.

Other Philco models which used it include the following:

37-60, 37-61, 37-62, 37-610B, 37-610T, 37-620B, 38-62, 38-9T, 38-10T, 38-60, 38-620

In a pinch, you could use a K-7 or K-21 speaker, which may be found in the following Philco models:

19B (NOT code 128), 43B, 71B, 71L, 89B, 89H

Another possibility is the S-14:

610F, 610T, 620, 625 (all 1936 models)

Really, any 1932-1938 8 inch Philco speaker with an 1125 to 1140 ohm field coil can be made to work with the proper output transformer made to match a single 42 or 6F6G tube to a 1 ohm voice coil. For more ideas, look over the Philco Speakers spreadsheet - speakers.zip - available here:

https://philcoradio.com/phorum/showthread.php?tid=215