No error. Every chip, including yours, spells it with an "e," plus many reference works and contemporary newspaper accounts spell it with an "e" -- Sloane. I wondered why others spelled it "Sloan," couldn't find out. Maybe it is like a color-colour type of thing, where learned people spell it differently., maybe a British-American difference. He raced in England a lot..
Robt.
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George M. Cohan (right) in "Gambling" (1934). "Originally, 'Gambling' was a stage drama, written by, produced and starring Cohan, that flopped on Broadway in 1929. Cohan starred in the low-budget film version five years later. Reportedly, the finished product was so dire that Cohan asked producer Harold Franklin to destroy all prints and the negative. Franklin appears to have complied: the film was previewed and briefly released, yet all prints vanished shortly afterwards." (Cohan, of course, is the famous "American entertainer, playwright, composer, lyricist, actor, singer, dancer, and producer. His many popular songs include "Over There", "Give My Regards to Broadway," and "The Yankee Doodle Boy." His life and music were depicted in the Academy Award-winning film "Yankee Doodle Dandy" (1942), starring James Cagney")
http://www.antiquegamblingchips.com/StillsA_TopMaleStars.htm