Improved concrete building block

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Improved Concrete Building Block: 'Improved concrete building block' (1906). Artist/photographer: Unsigned . Provenance: "Scientific American". Type: Antique halftone photographic print.

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Size: 1902px × 2027px
Photo credit: © Antiqua Print Gallery / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: 1906, 20th, antique, building, century, concrete, halftone, improved, photographic, print, twentieth, vintage