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Ernest Hallen
517 1/2 - K. Upper Locks, Gatun, Showing 208 1/2 ft. of East Side Wall Completed. April 1, 1910.
1910, 1 April
Gelatin silver print
George A. Smathers Libraries, University of Florida
Panama Canal Museum Collection, Resource Identifier: accession number - 2013.8.100, System ID: AA00017879:00001
LL/58003
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LuminousLint 
@LuminousLint