Atco id and dating

Your question is?

Sorry I'm new to all this I was so chuffed that I'd managed to get the pics on that I went to pot on the text,anyway the question was,there is no id plate on my mower it,s an Atco 17" with a kickstart,I think this the light isn't it?There is a number on the flywheel does this indicate the year as being 1957

1957 would be in the ballpark for that model.