I have a part #11311337843 sitting here brand new with the matching oil pump rotor. From what I can tell it fits /6 with points ignition. I'm under the impression that at some point in the /5 era the seal size changed. Okay, it looks like this is the large seal version. Anyhow, anybody have an idea of what it's worth? p.s. It looks like the small seal and post 1980 electronic ignition versions are available from Moteren Israel for 229 and 149 Euro respectively.