Canada 10 cents
USA 25 cents Weir Farm National Historic Site Connecticut
USA 25 cents Colorado State
Spain 500 pesetas
China - Republic 20 cents
Germany 20 euro German Birds - The Nightingale /Nachtigall/
Andorra
Australia
Austria
Belgium
Canada
China
Cyprus
Germany
Spain
Estonia
Finland
France
United Kingdom
Greece
Croatia
Ireland
Italy
Japan
Lithuania
Luxembourg
Latvia
Monaco
Malta
Netherlands
Portugal
San Marino
Slovakia
Slovenia
United States
Vatican City
