This is cool. I had never heard of such a thing on SW1200s, but these are accurate according to the pictures I’ve found online. The C&I ran right below where I grew up (a block to the tracks) and I don’t remember that sound. However they had a mix of other SW models with trumpet style horns too and those could have been the ones typically leading the consist.
I’m a little disappointed in some of the other details. The original SW1200 #39 that the C&I rostered (as well as its siblings) had dual lens headlights, an MU stand with slightly different angled handrails front and rear, and lighted oval number boards on either side of the long hood near the front just below the hood mounted handrail.
That said, I’m happy to have a model of a vivid childhood memory that I saw daily until late grade school when they started pulling the tracks up.
It also smokes like a champ!