Juvenile b. smithi exuvium. It's probably too young to tell, but I figure I'd still give it a shot. It can't hurt. The sling is small, about 1-1.5 inches. Does that maybe look like developing spermathecae? Or does that sound like wishful thinking?
My Grammostola rosea, Sieglinde (age unknown) moulted today, and I decided to check her gender. Sorry the photo's so blurry, but I only have a crappy cellphone camera. She looks like a female to me. Feel free to correct me if I'm wrong, though ; )