This Oscilloscope was previously owned by an electrical engineer and used by the owner from the late 60s through the 90s and periodically serviced by the owner before being placed in storage. Some of the knobs are a little stiff and there are two fasteners on the screen plate missing but powers on with functioning display. Some cosmetic issues from storage but cleaned up alright! Didn't have a signal tester so uncertain to what degree it performs and must sell As-Is for that reason.