T212s are popular both because they are such beautiful cards and because there are PCL and NWL collectors. Although there are some major leaguers who started in the PCL, like Buck Weaver, most of the players are not well known to non-specialists. THe lack of major leaguers and particularly HOFs probably limits popularity, especially relative to T206s, but they are definitely great cards and in my opinion, some of the best looking cards from the era.
JimB
