Cant add much more to help.
Andrews is a 1936 R313 and worth about $3-$4.
The generic card Ive never seen before but the glove looks 50's and the lefty throws a splitter.
The high school team Postcard has a NOKO stampbox that is said to be from 1907-29 so that doesnt help much in narrowing down the year.
http://www.playle.com/realphoto/phot...m655ujtf3qmne5