This is a Dayton Model 700 (2M037A) AC/DC Series Type motor.  It is in nice shape and works great. Comes with 115vac cord and base. The shaft diameter is 1/4" and the motor operates at 8000 RPM. This reversible motor was manufactured by Dayton in the USA, back when things were made to last.  Check out my eBay store for more great stuff!