Me thinks a SA3135. Because im not seeing any 'jewel'/'ruby' at the 13th date position like the yuki. also blue screws missing and the date gears are way different
Okay, so BP is using the Yuki aswell then? Seeing their new, released 16610 with SA3135
http://www.tb-688.com/index.php?route=product/product&product_id=2393