What's the origin of K&L's whistle on SP MK-5 "Mikado" type? (Version 2/ 5-Chime)

There's your official answer!
Whistle: Southern Pacific Desert Five-Chime
Original Whistle Video:
• LASTA leaving Delhi, La
Thanks! KremeStation!
From the sound of this particular 5-Chime, it sounds like it's either Star Brass or Chinese...