B&W mystery film

It’s hard to say exactly what happened with this film because I have no idea what kind of film it was. Sure it was in a Konica roll but it was pretty evident that it had been re-rolled into it. The clues were that it appeared to be black and white film in a c41 process canister and that the leader looked like it was hand cut with pinking shears. So Right from the start it was an iffy proposition. I believe I shot it as if it were ISO 400 but it could easily have been a ISO 100 film who knows. There is some under exposure in that. I also shot it mostly at night under artificial light that’s not going to help things. And finally not knowing what film it was my friend took an educated guess at the developing but it looks like it might be under developed. All this resulted in such faint images on the film that you couldn’t discern if there was an image or not. Thanks to my Epson V700 though I was able to at least get enough of a few images to jog my memory of shooting that night.  I seem to remember using a Pentax Spotmatic or K1000 but they are innocent in all this, its my willingness to try to take a picture with anything that is to blame.