It's hard to tell from the photo, but if the motor in the cab is rounded, it would probably be from the 1970's era. If it's a squared-off motor, it would be earlier. The state of the art has passed this one so long ago, it would only be useful as a static display. Somebody still running code 100 track and straight DC might be able to use it, maybe. The code 100 means the rail is tall enough the flanges on the wheels won't hit the ties while it runs.
When it absolutely, positively, has to get there (someday), ship on the ES&BM.