Old baseball. Markings "Sterling Quality," "T85"

My son was recently given an old baseball that appears to have never been used. I am trying to find something out about it. Here are a few markings: "Sterling Quality;" "T85", and made of "Horsehide." It is in its original box but the box itself has few markings - just some figures of baseball players. The box alone seems to date is first half of twentieth century. Any thoughts on this?

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