A special commemorative cover and personalized stamp was issued on 22nd December 2011 to commemorate Mr A.W. Dharmapala.
A commemorative cover was issued on Aug 24 to mark 'the last three-day County Championship game at Northampton'.
From then until 1940, a variety of commemorative covers was made up, most notably those marking the establishment of a radio link in 1938.
When the post office closed, on July 23, 1982, commemorative covers prepared by the Iowa Postal History Society gave the town's population as ten.
Even "serious" stamp collectors acknowledge the collectability of first-day covers, or special commemorative covers, or rocket mail.
The album was originally released November 17, 1998 with a commemorative cover.
In each of the next six weeks, another commemorative cover was released, each themed with one of Brooks' live performances.
After the return of Apollo 15 to Earth, it was discovered that, without authority, the crew had taken 398 commemorative postal covers to the moon.
There were special articles in the matchday programme and a commemorative cover.
One long-term source of commemorative covers is the Antarctic.