Does anyone remember back in the 1950's when you could send an unsealed card for a halfpenny less than standard postage or is my memory playing tricks on me?
//ABerrant
mike11111 - you seem to be better at remembering events from 1964 than those from 8 months ago! //
I hear that happens to men of a certain age.
The only reason I can think of is that it was very uncommon to put a return address on the envelope in those days, so undelivered mail would have to be opened in order to return it. Tis was much easier if the envelope was unsealed. Just a theory of mine.