Overlocker, Serger
This is not my machine, I saw it advertised, but it was too far away for me to have a look at it.
It appears in some ways older than the other Janomelocks in my collection. It looks more like a Baby lock or Pinnock.
I have put its images here, in case someone finds another of these machines or has a copy of the manual, which they are happy to share with me.
