When have been the build date for ff20 PRR class one and erie built builder's model?
PRR Class Builder’s Model Build date Total produced Wheel arrangement Service Power output
PRR locomotive classification
1140522
text text text real text text text
2-1140522-5
Fairbanks-Morse
Fairbanks-Morse
FS10 H10-44 1948–1949 55 B-B Switcher hp (kW)
FS12 H12-44 1952–1954 16 B-B Switcher hp (kW)
FF20 t Erie Buil 1947–1948 36 A1A-A1A Freight hp (kW)
FF20 Erie Built 1947–1948 12 A1A-A1A Freight hp (kW)
FF16 CF-16-4 1950 16 B-B Freight hp (kW)
FF16 CF-16-4 1950 8 B-B Freight hp (kW)
FRS-16 H16-44 1952 10 B-B Freight hp (kW)
FRS-20 H20-44 1948–1951 38 B-B Freight hp (kW)
FRS-24 H24-66 1948–1951 38 C-C Freight hp (kW)
SELECT Build date FROM table WHERE PRR Class = ff20 AND Builder’s Model = erie built
ff20 erie built