if it's got the Macy's name on it, it was sold through Macy's Dept store. It might look like a Singer, but it's not. Macy contracted with what ever company gave them the best deal to make the machines. I know early on, Singer prided itself in never selling machines they made under any name but their own.
I've got a SupreMacy - just had to get is because of my user name. Mine is a Japanese made post WW2 machine,