1939 R.P.O.  (ROYAL VISIT TRAIN) COVER ENTIRE ROYAL MAIL SERVICE CANCEL

PLEASE VIEW THE SCAN FOR WHAT YOU ARE BIDDING ON. 

NO STATE DESIGNATION. I HAVE NEVER SEEN ONE OF THESE BEFORE AND HAVE NO IDEA WHAT THE ROYAL TRAIN RPO IS. SEEEMS VAGUELY BRITISH BUT IS OBVIOUSLY A USA CANCEL. THE KING AND QUEEN OF BRITAIN VISITED AROUND THIS TIME. I WONDER IF IT IS THEIR SPECIAL TRAIN FOR TOURISTING THE UNITED STATES.