Smaller 2 - 6 - 2Ts , the 4400 class were introduced in 1904 .
Smaller 2 - 6 - 2Ts , the 4400 class were were succeeded by the slightly larger 4500 class in 1906 .
Smaller 2 - 6 - 2Ts , the 4400 class were introduced in 1904 and were succeeded by the slightly larger 4500 class in 1906 .