O (0-6-0)
classes
Driver diameter - all

Key
"-" = complete number range
"≠" = incomplete number range
"( )" = assigned but never carried
Class System Numbers Builder Built Notes
O-1-a CNR 7084 Baldwin 1889 -
O-2-a CNR 7000-7001 ALCO-P 1904 -
O-3-a CNR 7002-7005 CF 1907 -
O-4-a CNR 7006 Baldwin 1906 -
O-5-a CNR 7300-7301 ALCO-P 1907 -
O-6-a CNR 7007-7008 CLC 1892 -
O-7-a CNR 7009-7020
7265
MLW 1910 -
O-7-b CNR 7021-7030
7266
MLW 1911 -
O-8-a CNR 7085-7117 GTR-P 1884-1895 -
O-8-b CNR 7118-7123 GTR-P 1887 -
O-9-a CV 387-389 Lima 1903-1913 -
O-9-a CNR 7124-7247
7307, 7308,
7312, 7315
ALCO-S
Baldwin
CLC
GTR-P
Lima
MLW
1903-1913 -
O-10-a CNR 7031-7045
7250, 7252,
7253
CLC 1912 -
O-10-b CNR 7046-7065 CLC 1913-1014 -
O-11-a DW&P 7066 ALCO-S 1910 -
O-12-a CNR 7359-7413 CLC 1918-1920 -
O-12-b CNR 7319-7328 CLC 1914 -
O-12-c CNR 7329-7332 CAC 1915 -
O-12-d CNR 7333-7338 CLC 1918 -
O-12-e CNR 7339-7358 MLW 1918 -
O-12-f CNR 7414-7423 CLC 1920 -
O-13-a CNR 7302-7304 CLC 1918 -
O-14-a CNR 7067-7070 CLC 1902 -
O-14-b CNR 7071-7073 CLC 1904 -
O-14-c CNR 7074-7078 CLC 1906 -
O-14-d CNR 7079-7081 CLC 1908 -
O-15-a CNR 7305-7306 CLC 1904 -
O-15-b CNR 7307-7310 CLC 1911 -
O-15-c CNR 7311-7314 CLC 1912 -
O-15-d CNR 7315-7319 CLC 1913 -
O-17-a CNR 7082 Union 1869 -
O-17-b CNR 7083 Baldwin 1869 -
O-18-a CNR 7424-7473 GTR-P 1919-1921 -
O-18-b CNR 7474-7498 Lima 1920 -
O-18-c CNR 7499-7516 CLC
GTR-P
1922-1923 -
O-18-d CNR 7519-7521 Lima 1923 -
O-19-a CNR 7522-7531 ALCO-C
ALCO-S
1919 -
O-19-b CNR 7542-7543 MLW 1918-1929 -
O-20-a CNR 7532-7541 MLW 1911 -