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1st loud speaker operation pressing from flat piece of metal
Public domain

1st loud speaker operation pressing from flat piece of metal

1925-01-01 · photo, print, drawing

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

Subjects
glass negatives
Credit line1st loud speaker operation pressing from flat piece of metal. 1925-01-01. National Photo Company Collection, Library of Congress. Public domain.
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