T217 is a set of 25 b&w cards of Pacific Coast League players issued by Mono Cigarettes in 1911. Very little is known about the manufacturer, but Jon Canfield shared some interesting research he did back in 2010. Since 12 of the 25 players were on Los Angeles (the worst team in the league), it may be that the set was distributed there. In the T card encyclopedia, Lipset noted that there were only 2 known complete sets; thirty years later, that’s probably still true.
I have a dupe of Couchman (shown below) and would trade it for any of the ones that I need.