This is a Bahamas OHMS, or ON HIS/HER MAJESTY'S SERVICE Air Mail Cover sent from Nassau to New York on 9/28/1944.

There are a couple of things that make this little cover special.  First off, let's take noticed of the BOXED PASSED BY 2418 CENSOR Marking in RED.  Second, there is a BLACK DOUBLE RING CROWN CIRCLE PAID AT BAHAMAS Marking.  It's RARE to see this censored.  It's a lovely cover in Very Fine condition.