I bought a bulk loader and it arrived with film in it. I loaded up 10 shots and fired them off bracketing 1 stop around 100 and 200. After processing I have some very thin negatives that say "Eastman 10" and "Safety Film" at the bottom. They also say "C03470" in reversed letters at the top. The base fog of this is very high (.70) so I am assuming it is very old. I am not sure I want to use it, but I am curious as to what it may be. Any ideas?