Many thanks to Pablo Chandias for this lovely registered cover from Chile! It's just a pity that the stamps were not cancelled.
The Bicentennial of Chile took place on Sept 18, 2010. Its celebration commemorates the beginning of the independence process in Chile, with the first Government Junta of Chile on Sept 18, 2010, and that after eight years, Chile became a free and independent country.
To mark the Bicentennial, the Chilean Postal Administration has issued six beautiful stamps entitled "City of Antofagasta greets the Bicentenary". Antofagasta is a port city in northern Chile. Two of the stamps can be seen on this cover.
In November 2005, the Chilean government launched a campaign under the brand "Chile, All Ways Surprising" intended to promote the country internationally for both business and tourism. It is not surprising that they made used of postage stamps to help in this cause.
The $90 blue stamp was issued in 1995 to celebrate "Navidad" or "Christmas Day".