Silver medal 2011 Calendar proof

An “astrolab“ featuring rectangular boxes with calendarium is depicted on the base field of this medal. An astrolab is a historical astronomical apparatus which was used in the past by astronomers, astrologists and navigators to determine and predict the position of stars and the Sun.

The motif on the obverse and the reverse side is almost identical, it is distinguished only by individual months and the astrolab is slightly turned on the reverse side.

Limited edition of 500 pieces.