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PRISTINE CONDITION!!!!This is a Wilton Model 4400 (or 4400A) 12-inch disc sander (also called an abrasive finishing machine). 
Key details from the machine’s labels and appearance:
• Manufacturer: Wilton (Wilton Abrasive Finishing Machines)
• Model: 4400
• Serial number: 28595
• It is a heavy-duty vertical disc sander with a large (~12-inch) abrasive disc, adjustable work table (tilts for bevel sanding), and a cast base/cabinet stand. 
These industrial machines are designed for sanding wood, metal, or other materials. The Model 4400A version typically uses a 1.5 HP motor running at about 1,960 RPM. Wilton later became part of the WMH/JET tool group, and similar models remain available under related brands.