File:Blink comparator 1.JPG

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English: Blink comparator in the Meridian hall of the Helsinki observatory. Made by Carl Zeiss in early 20th century.
Suomi: Stereokomparaattori Helsingin observatorion Meridiaanisalissa. Valmistanut Carl Zeiss 1900-luvun alussa.
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Author MKFI
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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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current20:06, 12 January 2013Thumbnail for version as of 20:06, 12 January 20135,184 × 3,456 (10.5 MB)MKFI (talk | contribs){{Information |Description ={{en|1=Blink comparator in the Meridian hall of the Helsinki observatory. Made by Carl Zeiss in early 20th century.}} {{fi|1=Stereokomparaattori Helsingin observatorion Meridiaanisalissa. Valmistanut Carl Zeiss 1900-luvun...

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