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Keywords: Kronometrejä 2.JPG en Chronometers in Helsinki observatory From left Robert Roskell ca 1850; Knoblich ca 1870; William Weichert ca 1885 fi Kronometrejä Helsingin observatoriossa Vasemmalta Robert Roskell noin 1850; Knoblich noin 1870; William Weichert noin 1885 own MKFI 2012-12-01 Collections of the Helsinki Observatory Chronometer 2012 in Helsinki December 2012 in Finland Taken with Canon EOS 60D Taken with Canon EF-S 15-85mm F3 5-5 6 IS USM Files by User MKFI |