One of my favorite Manley popcorn machines is the Model 47 (M-47). It is similar to the M-46, M-48, and M-49. There is some confusion on the model numbers of the Manley popcorn machines. For example, the model number listed on the following machine's ID tag is 47, not M-47. The Premier line also used model 48 and model 49 (there may be more, but this is what we have found to date) to identify the Premier machines as well. So, if someone mentions a model 48, it could be either a Premier or M-Line model.
M-46 through M-49 Restoration Page This page contains information on restoring these Manley popcorn machine models, including suggested replacement parts and a wiring diagram.
Below is a photo of my restored Manley M-47. You can see the restoration process at my Manley Model 47 Web Site.
Apparently Manley made a counter top model as well:

Manley also made a larger version that was two machine in one for places that needed large amounts of popcorn:

The Manley M-47 appears to be identical to Patent 2,536, 298 granted to Charles T. Manley, deceased and assigned to Manley Inc. The patent was filed on April 10, 1948 and granted on January 2, 1951. You can search for patents at the U.S. Patents and Trademarks Office at http://www.uspto.gov/patft/.
A scan of the Manley M-46, M-47, M-48 instruction manual in pdf format follows:
Warning--extremely large file size
Warning--extremely large file size