Sorry - just found the pic in another post.
EDIT: I'm having difficulty diagnosing a fault on a one-button chrono using the above movement (or derivative). The setting lever appears to be slightly too short to fully engage the rocker teeth with the setting teeth. I'd like to compare the dimensions of the setting lever - it seems to be a little too short - by looking at a photograph of a known good version of the movement. So far searches haven't revealed one to me.
Here's mine - and yes, it's absolutely filthy: