This is a Niue Island Official Mail Registered Cover.  It was sent from the Philatelic Bureau in Niue to the Nederlands on 3/18/1978.  

What makes this cover so special and RARE is the Boxed OFFICIAL PAID POST OFFICE NIUE marking in BLUE!

You don't often see these available, so get them while you can!  If you like this item, come check out our store!  We offer a wide variety of covers and stamps for all your philatelic needs!