BLizzie, I'm so happy you got a Singer 99K. Your machine is beautiful!! I think the 99's are just neat little machines. You will love sewing with it. I am the proud owner of 2, one that is electric and the other one has a knee bar. Mine from the 1920's, but look a lot like yours. Mine don't have numbers on the tension, does yours? And like yours, they have the knob for the stitch regulator. Almost any short shank attachments will work on your machine. Now I also would like a hand crank machine. Will it be a 99 also? who knows? But I'll be watching out for one.
Janis