I found this camera at work. It had a endoscope attachment (I'll post pix later) but no "real" lens. Are these collectible? It has been in a surgery department for probably 30 years so it's VERY clean. I did not attempt to clean it before these pix and most of the dust is probably from the bag I brought it home in. Also, where would be a good place to find a lens for it. I'd like to play around with it since it seems to function perfectly. Thoughts?