Divided metal box thing (Edmonston/Hyattsville)

Metal box that was left under my kitchen sink when I bought my house. It has six holes in the sides and a divider in the middle. Fairly heavy for its size. 20.5”L x 5”W x 3.5”D. Maybe you know what it is or just think it’s neat-o. Porch pickup only. Please let me know when you can pick it up. Thanks!

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