What Phonographs are in this photo

[PhonoPhotoGuy]

I just received this photo and I am trying to ID the 3 phonographs that are shown in it...they appear to be Edison treadle phonographs..?
Thank you.

[howardpgh]

The machines in the pictures look like the electric motor "Class M" type to me. I'm no expert.
The exposed vertical governor is what I'm basing my guess on.

[cmshapiro]

These are Edison Class M machines in the desk type format as sold by The North American Phonograph Company. These photos perfectly illustrate the office use of these machines. Here is a surviving example from the Charley Hummel collection.

[AmberolaAndy]

These are Edison Class M machines in the desk type format as sold by The North American Phonograph Company. These photos perfectly illustrate the office use of these machines. Here is a surviving example from the Charley Hummel collection.

I always like these early machines being built into desks and drawers like that. Like the ones built into their record storage drawers.