WARSAW: Chopin experts are trying to determine whether a photo that has surfaced in Poland is really of the 19th century composer. If authentic, it would be only the third known photograph of Frederic Chopin, who lived from 1810-1849. Wladyslaw Zuchowski, a photographer and gallery owner in Gdansk, said Thursday that he bought the daguerreotype, the earliest type of photograph, from a private owner in Scotland. The framed copper and silver image bears the date 1849, when Chopin died in Paris, and the stamp of Louis Auguste Bisson, a photographer who took another picture of Chopin.