KGVI Cypher on cover posted to B.E.F. XI General Hospital Le Havre.

[Chris Weddell]

Hi All,

        A cover which just came in the post today. The cover was posted to a Nurse who on the 16th of December was reallocated   
with the XI General Hospital which was based at Netley to Le Havre, France  from the 16th of December 1939 until June 1940.

Can anyone tell me why this has a King George VI cypher mark or cachet on it. !!!

                                                              Cheers

                                                              Chris