G'day Ironbark
Thank you for your interest. From what I have been told by other knowlegeable people this little moer is an 'Eclipse' from the late 50's.
Eclipse was an American mower from my research. Maybe someone used their bases and fitted the Simplex motors.
All sorts of strange things happened with mowers from that era. Or it may be a one off put together by the owner when the original motor failed.
I would love to find a cowl for it. There are three threaded horizontal holes so I guess that is what they are for.
I will keep searching.
Cheers
Tassie Dan