AMSTERDAM (AP).- Experts have reclassified a painting as a Rembrandt after years of attributing it to one of the Dutch master’s students. Ernst van de Wetering of the Rembrandt Research Project said Friday that X-ray analysis of “Bearded Old Man” has revealed outlines of a self-portrait of Rembrandt as a young man underneath. He also cited stylistic analysis and circumstantial evidence in support of the conclusion that the painting — showing a man with unkempt white hair, lost in thought with just a hint of sadness — is by the Dutch master. Van de Wetering dates the small (15 x 20 cm, 6 x 8 inch) but emotive painting to 1630, when Rembrandt van Rijn would have been 24 years old. Rembrandt’s reputation as a portraitist was rapidly growing and he was preparing to leave Leiden for Amsterdam, which at that time was enjoying its golden age as a major naval power.