Pro Patria -Castles on Stamps of Switzerland 1976
The theme for Pro Patria issue of 1976 was Castles. Swiss Post issued a set of Four Stamps on 28 May 1976. A FDC with First Day Cancellation of Bern is listed.
The Castles featured on stamps are
20+10 ct – Kyburg Castle (Zurich Canton)
40+20 ct – Grandson (Waadt Canton)
40+20 ct – Murten ( Freiburg Canton)
80+40 ct – Castello di Montebello (Tessin Canton)