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Kevin OIt appears to be the front cover (or was destined to be) of an 1880s scorecard. Maybe a large printing company did the polychromatic covers and then shipped them en masse to its customers. The graph lines could have helped the second printer align the actual interior. Maybe the particulars of the local scorecard (club and player names, advertisers, etc.) would then be printed in monochrome by a local printer. Do you think there might have been a back cover that was detached, or could this be a sample sent to prospective buyers (hence the printer's stamp)? Wild guess on its actual use, but it does look like a scorecard cover.
"Stern Chase" refers to what followed when any batted ball got past an outfielder. He would have a long way to go to get the ball, just as a sailing ship would have to circle around to retrieve any item that went off its own stern. I have to admit, however, that Stern Chase would be a pretty cool name--sort of like a TV weatherman or something found in the register of a local motel (ala Lance Mannion).