Thanks AVB and CM The saw oils pretty well using the plunger on the handle as a manual oiler, as it is unlikely that I would be able to get parts for it in any case , I don't think I will be pulling it apart to check. If I have need to take it apart later I will have a look. I have posted a photo of the serial number but unfortunately if it ever had a suffix it is impossible to read now.
If I can get a large enough hammer it will run for awhile just trying to get away from me
