You are indeed very lucky! And it makes perfect sense if you had a Singer Store in your town there would be a lot of them around. My grandmother told me once she bought my mom the Singer in the cabinet for my mom because she was a good seamstress and made a lot of her clothes. She bought my aunt a small Singer portable because she needed to be able to hem or repair items from time to time but never liked to sew. So a lot of people that didn't really sew but needed to have the ability to repair bought the small portables to keep handy. I asked my aunt about it once, she said she knew she still had it "somewhere."
Enjoy your surprise.