This page chronicles the year that "modern" steam locomotive classes first appeared on the Pennsy, starting in 1900.

Going back before 1900, the results are really convoluted and inconsistent due to the PRR's absorption of subsidiary line's locomotives.

Disclaimer: This list may not take into account all rebuilds.

Models in bold are represented in the author's collection.

 

Year Class Comments
1900 D16b 
D16d
D16sb
E1a
G34a
 
 1901 E2
E3
F3
F3b
G35s
H6a
 
1902 E21
E2a
E3a
E7sa
F3c
F24a
G35
G35sa
 
1903 B6
B6s
B8
B23
B29
E2c
E7s
E22
F3sc
F25
H6b
 
1904 E2b
F26
 
1905

E28
E29
H6sa
H6sb
H28s
H34s

 
1906 A4
D16sa
E2d
E3d
E23s
F27s
 
1907 G36s
G37s 
H8
H8a
H9s
H10s
K28
 
1908 H8b  
1909 H8sb   
1910 E5
E6
H8c
H34sa
K2
K2s
K21s
 
1911 E5s
HH1s
K2b
K2s
K2sa
K29
L1s
 
1912 CC1s
E6sa
H8sc
K2a
K2s
 
1913

B6sa
H6sb (rebuilds)
K3s

 
1914 E6s
H9sa
K4s
 
1915 H9sa (rebuilds)  
1916 A5s
B6sb
I1sa
L1sa
 
1917 H8sc (rebuilds)
H8sa (rebuilds) 
 
1918 B28s
I1s
N1s
 
1919 CC2s
HC1s
L2s
N2s
N2sa
 
1920    
1921    
1922    
1923 G5s 
M1
 
1924    
1925 C1  
1926    
1927    
1928 A6  
1929 K5  
1930 M1a
M1b (rebuilds)
 
1931    
1932    
1933    
1934    
1935    
1936    
1937    
1938    
1939 S1  
1940 I1sa (rebuilds)  
1941 J1  
1942 Q1
T1
 
1943 HH1
J1a
Acquired from N&W; built 1919.
1944 Q2
S2