I have a cute blue/grey and cream treadle machine that has a metal badge marked National Sewing Machine Co. It is rather squarish in design and the logo font on the top looks like late 50's maybe. The machine doesn't look anything like any of the National pics I have found. I am in Japan but everything on the machine is written in English along with the 'accesories' tin. The direction book is in Japanese but for a different looking machine. Serial no. 400267. Can anyone tell me anything about it? Thanks