AK Mag... What kind is this??

[joker619]

Purchased this about a week ago. Trying to figure out what country this AK mag is from. Has a small stamped B and a stamped hook design. Anybody have any idea??

http://tapa.tk/mu/aefe2262-ab9b-e3d8.jpg

http://tapa.tk/mu/aefe2262-abb0-e9d0.jpg

http://tapa.tk/mu/aefe2262-abc5-489b.jpg