File:U. S. Department of Commerce. Map of standard time zones of the United States and adjacent parts of Canada and Mexico as of January. 1 - 1948 - btv1b531895575.jpg
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Size of this preview: 800 × 578 pixels. Other resolutions: 320 × 231 pixels | 640 × 462 pixels | 1,024 × 740 pixels | 1,280 × 925 pixels | 2,560 × 1,850 pixels | 9,456 × 6,832 pixels.
Original file (9,456 × 6,832 pixels, file size: 8.42 MB, MIME type: image/jpeg)