+Zephyr4501 Southern's Crosby whistles were slightly higher than PRR (Altoona and Ashton Valve) and had a different timbre. L&N (Crosby) had the same tone but different timbre than the McCavity 3-chime from Canadian National. Look up L&N #152 and Southern Pacific #2353 (footage from 2000), because both whistles in the video have the same sound and timbre and are both L&N whistles).
+Erich Diebold that's not a QJ whistle its clearly the 261s' original whistle she used 1993-1996 before getting the ATSF 6 chime whistle in 1996 I believe that's correct