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This is an original 1931 black and white halftone print of the Bureau of Standards, a government funded research facility in Washington D.C..
CONDITION
This 80+ year old Item is rated Near Mint / Very Fine+. No creases. No natural defects. No surface rub. No tears. No water damage. Please note: There is printing on the verso.
Photography by Capt. Albert W. Stevens.
NGM8A11C31