These PHQ (Postal headquarters) stamp cards were part of an issue of stamps in 1984 to commemorate the 500th anniversary of the founding of the College of Arms.
The top card shows the Arms of Richard III, the founder of the College of Arms, and whose remains have recently (2012) been found under a car park in Leicester, in what was the Church of the Grey Friars not far from the cathedral. It wasn't until this year in February that the remains were finally confirmed as definitely being those of Richard III.
The second card shows the arms of The Earl Marshal, a ceremonial position and one of the Great Officers of State.
This is a post for Sunday Stamps, now hosted by Violet Sky at "See it on a Postcard!"