Horn recommendation for the Alco S2

Hey, rivet counters!
What horn would you think is appropriate for use on an Alco s2? Currently, I'm using (by permission) the one from Rick Grout's RS-1. It's not a bad sounding horn, per se, but I'm more interested in using the standard horn of the vehicle of that time, or something close to it, that maybe is already here in the library. I've checked a couple of wiki's , but they're not always accurate.
Your thoughts?
Was there a standard, back then?
Thanks for any suggestions, or direction.
Best,
Rich

What horn would you think is appropriate for use on an Alco s2? Currently, I'm using (by permission) the one from Rick Grout's RS-1. It's not a bad sounding horn, per se, but I'm more interested in using the standard horn of the vehicle of that time, or something close to it, that maybe is already here in the library. I've checked a couple of wiki's , but they're not always accurate.
Your thoughts?
Was there a standard, back then?
Thanks for any suggestions, or direction.
Best,
Rich