Thank you TR9er for bringing the thread back to life! We look forward to hearing more.
It's the little details such as the letter which I find so interesting, not least its careful punctuation with stops after every initial such as R.A.F.V.R., and commas ending each address line. Only those who learned to type almost 60 years ago, on massive, clattering manual machines, can appreciate the effort required for such detail though we thought nothing of it at the time.
I think the Civil Service and possibly the armed Services dropped full stops in the 1970s and now grammar doesn't seem to matter much, never mind punctuation. Happy day's