For those interested, I found a link to an SEC filing on the other forum. The SEC filing by NW outlines the E175 delivery schedule as follows:

By DEC 07 = 9 a/c; then

2008
JAN 3
FEB 3
MAR 2
APR 2
MAY 2
JUN 3
JUL 2
AUG 2
SEP 3
OCT 2
NOV 2
DEC 1

Reference: http://www.sec.gov/Archives/edgar/da...Matters_112223