The new version of the Webb catalogue (issue 8) says in page 339 that the three air letter sheets featuring Gliders etc issued between 1991 and 1995 are (A 83 to A 85) NOT tagged. All the examples I have are tagged
I assume that this is an error on the part of Webb but can any one confirm that untagged examples do exist. It would appear to be a backwards step by the Post Office to have issued these without the tagging.
Webb also say that there is a fine rouletting along the folding lines - I cannot see any trace of this from the back of the sheets