Christie's New York. Daguerreotypes on silvered copper or metal plates were produced between 1835 and 1860 before these were replaced by photos printed on salted paper following some quick improvement in photography-taking. Photographers needed over 20 minutes to take a daguerreotype shot and such type of photo was quite fragile apart the fact that it could not be multiplied. Portraits are usually worth between US $ 100 and 300, nudes, considered as pornographic in the 1850's are valued between US $ 1000 and 12,000 depending on the quality and sizes of the plaques. Landscapes, quite rare, offer usually the highest prices. This one was estimated US $ 20,000-30,000 but its historic interest and spectacular side was enough to produce such bid.