The series 1 used a 197cc Villers 5E. I am not sure the parts I have are from an Ambassador as the forks are straight leg and the twin front down tubes. The Carlton, James and Zundapp also had this style of pressed metal forks and similar wheels to mine, but with single down tube frame. I wanted to get a photo to be sure it either was or wasn't an Ambassador Series 1. If I can eliminate the series 1, then it may be something put together in Australia of imported components. It is not a Waratah, ACME or Norman.