UPU International Reply Coupons with Holograms There are more than one hundred (100 +) countries in the world that sells International Reply Coupon I was surprised that my small town post office had some in stock! Below are mint copies of IRC and postmarked ones. These International Reply Coupons fits perfectly well inside a topical Holograms on Stamps collection.  Even though the coupon per say, is not a stamp, it is definitely a philatelic piece of great interest. Notice the UPU emblem in the hologram. To mark … Continue reading →