Hi everyone. I recently purchased a used Lomo 6x6 camera; inside was a half-spent roll of film which I went ahead and wound to the end. The only markings on it are a logo for Jessop's, the expected "EXPOSED", "120", "ISO100/DIN21", and the cryptic "R17" in bold type. Who (most likely in the United Kingdom) could tell me what kind of film this is? More to the point, which process do I use to develop it? Curiosity is getting the better of me, and an Internet search has provided nothing but more questions. Thank you in advance! Darin