Buick identification

From Crankshaft Coalition Wiki

hey guys. i recently purchased a 1934 buick. the tag rivited to the firewall states that it is a 1934 buick model 56. it is a three window coupe. i have been trying to find information regarding this car but have uncovered nothing. i would like to know as much about it as possible, especially how many were made. if anyone can help please email me at mtrichert87@hotmail.com thanks. Mark.