Wednesday, 4 March 2009

Cover from Spain

A cover with two stamps sent from Donostia (San Sebastián) in the Basque Country on 25 February 2009 and received 2 days later.

The larger 57 eurocent self-adhesive stamp was issued on 17 May 2006 in the Sciences series and commemorates the XXV International Congress of Mathematicians held in Madrid in 2006. In the bottom part there is a sequence of ancient Arabic numerals from the Vigilantus Codex kept at the El Escorial monastery in Spain, considered one of the oldest records of these numerals.

The violet self-adhesive stamp was issued on 2 April 2007 in the Nature series, along with a canary.

Thank you, Olaia!

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