Onan gasoline engine, fully portable, no external power required.
Came from a General Electric shop where it was used for floor work. Unit was decommissioned when replaced with newer equipment, not due to failure. It was running at the time it was taken out of service.
Has been sitting for several years, so it is currently non-running and will need gone through, likely fuel system cleanup, fresh gas, and general servicing.
These older Lincoln/Onan units are known for being very durable and are worth bringing back.