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NAVAL OBSERVATORY. TIME BROADCASTING INSTRUMENTS
Public domain

NAVAL OBSERVATORY. TIME BROADCASTING INSTRUMENTS

Harris & Ewing · 1917-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

Subjects
washington (d.c.)district of columbiaunited statesglass negatives
Credit lineNAVAL OBSERVATORY. TIME BROADCASTING INSTRUMENTS. 1917-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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