I can almost see 192K on the plate behind the stitch length lever, it would indicate model and UK production. I have read some Spartans are 99Ks, just very simply made up. Im not sure at all, there's not that much on this model on the web. I think the stitch length lever is always there, and the bobbin winder is very minimal, with out auto release when the bobbin is full. What does the plate on the motor bracket say? Does it have a fitting option for the lamp in the back? Is the small pedal still with the machine? I search for the 192K on ismacs and there are batches registered with serial number. The more I remind my self of this, I don't mind having a 99K.