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Keywords: Lankamikrometri 2.jpg en A Repsold Söhne thread micrometer from 1889 in Helsinki observatory fi A Repsold Söhnen lankamikrometri vuodelta 1889 Helsingin observatoriossa own MKFI 2012-12-01 Collections of the Helsinki Observatory Filar micrometers 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 A Repsold Söhne Files by User MKFI |