not sure - there is a noodle style canti cable guide brazed onto the frame near the top of the seat tube.
Don't know what to do with this bike. It looks like it has potential - it has rack mounts - so it could be built into a nice commuter/tourer, or retro MTB.
I also have a longstanding urge to strip and re-paint a frame. This might be the frame to have a go with......