Echeveria seed? Or not. (photos)

Hi everyone,
my largest E.affinis 'Black Knight' flowered quite a while ago now - I've been hoping to collect seed from it so I've been letting it dry out. I'm not sure if it's self fertile.. I don't think I had any others flowering at the time. I haven't had any experience with collecting echeveria seeds, but I know they're microscopically small. Here's a few photos. Could anyone tell me if they are indeed echeveria seeds, or just parts of the dried flowers? They do look like seeds to me.