I posted this over on the "Sewing" board, but I guess it's not as active over there, so thought I'd try my "tried & true" place for answers.

I'm wondering if there are any "button" people on this board who might be able to steer me in the right direction. I would like to know what the buttons in the picture are called. They are metal, not solid - more of a shell. It just seems like there's something missing, but then again, maybe not.

Would appreciate any leads. Thanks.