| G. Stiozzi Ridolfi Label on back of photograph given the sitters, place (Florence), date and exposure time of 25 seconds at 10:45 1844, 24 April Photograph. back Atelier Petzval Collection LL/60649 The photograph is a daguerreotype portrait but uncertain if it is a direct daguerreotype or a reproduction of an earlier daguerreotype.
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