Watch List notes:

ANDORRA: Republic, AE 10 centimos, 1873, Bruce-X2, REPUBLICA DE LOS VALLS DE ANDORRA (Republic of the Valleys of Andorra) around arms of the Principality // CIEN PIEZAS EN KILOG (100 pieces are one kilogram) around denomination, date below, NGC graded MS64 BR, R. A privately issued pattern for the "Republic de los Valls de Andorra." This coin was struck at the Brussels mint by dies prepared by Birchaut, for the ethnic Basque peoples of Andorra, who themselves supported the Carlists of Spain during the Third Carlist War of 1872-1876. Reported mintage of 250 pieces.

Estimate: 400-500 USD