Provisional Government (1868-1870). Third decimal coinage. 10 milesimas = 1 centimo; 100 centimos = 1 peseta.
50 centimos 1892, silver .835, weight - 2,5 g., size - 18 mm, thickness - 1,03 mm. First portrait of Alfonso XIII.
50 centimos 1900, silver .835, weight - 2,5 g., size - 18 mm, thickness - 1,1 mm. Third portrait of Alfonso XIII.
50 centimos 1904, silver .835, weight - 2,5 g., size - 18 mm, thickness - 1,1 mm. Fourth portrait of Alfonso XIII.
50 centimos 1926, silver .835, weight - 2,5 g., size - 18 mm, thickness - 1,1 mm. Sixth portrait of Alfonso XIII.