Mike, The other two box's read -
Penalty for private use to avoid payment of postage, £50 -
and the next box is -
Gebruik van hierdie onstage om posted to ontduik is strafbaar met £50 boat.
Does this help to confirm that it is South African as it would appear so.
The half torn of OHMS label has Admiralty return note but no address and the only part of the address left is to Accountant ------------Southampton and an Official black stamp with rest missing and the usual red Maritime Mail cancellation.
On the bottom of the envelope it has printed -
Use paper sparingly - Gebruik papier spaarzaam

I await your further thoughts.

Bill

I have just purchased an envelope (small) and it has been reused with a damaged OHMS Admiralty label. On the back it has printed in capital letters ' O.H.M.S.- I.D.V.S.M. ' and after this in a box E with under it 14 followed by penalty for private use, and followed by a foreign language. Under all this space for address 1 and 2. Sorry but my scanner is up the creek !!!

Can anyone advise what the initials after OHMS stand for.

Many thanks. Bill

Thank you all for this information. Had computer trouble and have now taken over my wife's Apple Mac and I am now trying to get to grips with new systems, so apologies for the delay in replying. The later cards dated 3/8/19 to 21/11/19/are all war damage cards. The one above I found in my collection of APO cancellations cards. I have sent them all to Mark Wingham of Picture Postcard Monthly and he is going to put them in the magazine with some other items that are similar, I will now send him this additional information which has been of great help and would explain how she was in France so long which confused me. I will let you know which month it will appear.
Thanks once again and I am sorry I will not be there on the 10th as it clashes with the Canterbury , Wetgate Hall, Collectors Fair.
When I get them back I will bring them to the next meeting. I am intending to try to get to more meetings.
Incidentally Michael I have quite a large collection of FPO & APO markings with numerous dates and would appreciate you advice as to how to get them in some sort of order so I can trace items etc.
Regards. Bill

In a 25p box I came across 7 postcards sent by Alice to her sister in Beckenham in 1919. They were all of them war damage cards  and it sounds as though she was on a Battlefield Tour !! I then found the attached card in my album which pre-dates these cards and I would appreciate advice as to the inscription at the top of this card of Tours which is not a war damage card and how did she manage to send it through the American Expeditionary Force system. i am now going to try and attach the detals and lets hope it works .