world war two - What is this artillery shell? - History Stack Exchange

I found this in my Grandfather’s basement. He served in World War 2, in the Pacific Theater. He sadly passed away and we have no idea if this is safe. Can anyone help with identifying this? It is 13

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world war two - What is this artillery shell? - History Stack Exchange

world war two - What is this artillery shell? - History Stack Exchange

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Artillery shells world war hi-res stock photography and images - Page 3 - Alamy