They are Baseball Magazine Player Posters issued from 1910-1957 listed on page 30 of the 2009 edition of the Standard Catalog of Baseball Cards. Cobb books $350 in NM condition and is a 1910 issue. Your Ruth portrait is a 1947 issue and books $100 in NM per the Standard Catalog.
I collect them and I prefer the earlier issues like the Cobb, the 1910 Wagner is AWESOME. Many if not most are Conlon photos.
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