General Electric Mixer How To Find Information On An Old General Electric Stand Mixer?

How to find information on an old General Electric Stand Mixer? - general electric mixer

I have a stand mixer, was my old grandmother. I did it when she died. I'm trying to understand what year it is. I know as much as possible about the style. Where can I find this information? I checked the lower pane. They say ....
General Electric Cat No: 149M8 Series A, No.

Thank you!