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HankronThe M114s are 'Baseball Magazine' Premiums. The magazine issued similar style/color premiums for many years, at least until the 1950s. They generally do not get much respect in the hobby, in part because premium prints rarely get much respect by trading card collectors and possibly because of the brown tone (They really could have picked a better color or, even better, have it in colors).
The aren't rare, and the Gaynor price is probably typical for the Cobb or similar star. I think it's worth having one or two, as the are like miniature posters.