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Administration building, Naval Observatory ca. between 1909 and 1919
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Administration building, Naval Observatory ca. bet...

Standard clock, Naval Observatory ca. between 1909 and 1919
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Standard clock, Naval Observatory ca. between 1909...

Charles C. Wylie setting back clock at Naval Observatory ca. between 1918 and 1928
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Charles C. Wylie setting back clock at Naval Obser...

Chester Burleigh Watts turning back the hands of a clock at the Naval Observatory in 1918 (possibly in honor of the first Daylight Savings Time) .
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Chester Burleigh Watts turning back the hands of a...

Chester Burleigh Watts turning back the hands of a clock at the Naval Observatory in 1918 (possibly in honor of the first Daylight Savings Time) .
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Chester Burleigh Watts turning back the hands of a...

Your binoculars could prevent this Loan your 6 x 30 or 7 x 50 Zeiss or Bausch and Lomb binoculars to your navy : Pack carefully and send to Naval Observatory, Washington, D.C. circa 1941-1943.
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Your binoculars could prevent this Loan your 6 x 3...

Time Anywhere In The World
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Time Anywhere In The World

Naval Observatory Telescope
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Naval Observatory Telescope