Digital Camera Repair Questions? Ask a Camera Expert.
Perhaps you would like to see pictures of the camera? I have three. It appears in all respects to be an original, working camera and the repairers found nothing extraordinary about it either - just a faulty electronics board which was replaced by canibalising another Canon EF. I spoke to my son who is a knowledgable amateur, and he suggested that it was found faulty at time of manufacture and was utilised as a demo camera only to the trade - thus saving the expense of repairing it at the factory! Sounds a little far-fetched to me, but I think it was a working camera from the start and eventually developed a fault.
The body of the camera is metalic. The paint finish shows very little signs of use, so I suspect it has been lying about unrepaired for nearly 40 years until I acquired it from Canada about a year ago. It's a puzzle. My son says I am lucky to have found something marked DUMMY that could be repaired and will be useable. Perhaps he is right. But I prefer to think it was a preproduction model intended for demonstration purposes to the Trade, and when it developed a fault it is fortunate it was not scrapped...