Shell stamps

In 2014, PHLPost issued Shell commemorative stamps which "set a number of firsts in local philatelic history."

http://www.philstar.com/business-life/2014/12/29/1407302/shell-stamps-make-mark-history

Here's an excerpt:

"The Shell stamps are the first to make use of gold foil hot stamping, as well as tactile sand varnished on the pecten and Shell centennial logos, lending distinctive texture and adding to the unique experience of handling the stamps. Likewise, its special size measures 50mm by 30.5mm, which is bigger than ordinary stamps."