(Originally posted at http://joelnoche.multiply.com/journal/item/110/NGB-vs.-BSP on August 27, 2012 11:17 AM)
The New Generation Banknote Series was supposed to replace the BSP Series last 2010. It did, but only for a month or two. By 2011, the NGB series was gone and the BSP Series was back. I haven’t seen any NGB bills dated 2011, only BSP bills. For 2012, it seemed that the BSP Series would continue, but I just discovered a 2012 NGB bill.
If you know the story behind these changes, please leave a comment.