I found this You Tube video linked here at baseballthinkfactory and it is super cool. Some of the older TCB posters may remember the article that rastronomical posted a couple of years ago about Three Finger Mordecai Brown. Brown, a famed pitcher in the early part of the 20th century, perfected a tough breaking pitch made more uncommon by the farming accident which left him with missing fingers on his pitching hand.
This video is based on putting together still photos of Brown's pitching motion. As you can see, the description of Brown's delivery as unorthodox is confirmed by the video.