This is a Barbuda OHMS, or ON HIS/HER MAJESTY'S SERVICE Registered Cover sent from Barbuda to Germany on 9/29/1924.

There are a couple things that makes this little guy special.  First up is the use of the King George V Barbuda OVERPRINT 1/2d, 2d, 2 1/2d, and 6d postage stamps, all of which were properly backstamped in transit.  The second is the Red Barbuda B.W.I.  Then there is the CIRCLE OFFICIAL PAID BARBUDA Cancel!  Truly a RARE and fascinating cover!

This item is over $100 USD so I will ship it using Priority Mail in the US, and Registered Mail overseas.  This is to ensure that it reaches you in a safe and timely manner, and it includes tracking!