Can you please help me to identify the significance of the printed letters "L . T . R" on an "On His Majesty's service" letter front? They are all in the same text WITH DOTS BETWEEN THESE 3 Letters which would indicate they are not just an abbreviation for "letter". I hope that this is enough.

I must apologise to you all particularly to Ron of Earsathome who kindly & quickly pointed out that the attachment (from my scan of the item) is not on. Therein lies another of my difficulties, which I am trying to fathom out.
Thank you LKfman

Hello,
Your image does not appear on the post.
Can you try to load it up again so we can see if we can help
Regards.
Ron.