This image depicts the hydraulic testing of 75 mm shells in the John Bertram & Sons Co. plant in Dundas, Ontario, Canada during World War I. The shell is filled with a solution and placed upside down on a Metalwood press. An inspector tests the expansion of the shell under pressure to ensure its integrity and checks for flaws in the steel that could allow moisture to pass through.

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Size: 8425px × 5786px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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