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On #2 can read 'Erection Car No. 3 Hamilton Bridge Works Co. #3&4 show span falling and wrecked crane. Divided, unused, CYKO 1904-1920's stamp box, #4 has corner crease
"It was the most prolific bridge -building company- between 1910 and 1950, specializing in steel truss bridges.The companies that formed this larger company included: The Hamilton Bridge Company (1910-1950), The Hamilton Bridge Works Company (1900-1920), The Hamilton Bridge and Iron Works Company (1800-1900)."
