Each item in the set (Hong Kong Government’s “Postage Prepaid Picture Card Series No. 54”) has a different postage denomination, and they all fold out in the way you can see.  The back of each item looks like a postcard, with pre-printed postage postmarked on the first day of issue (31 March 2016), but it is stretching things to call these “postcards”.  Regardless, we have this one set available, unused.  Those black areas are just to remove some glare from the scan.  No deep meaning!  Grade: 1