I'm curious because, according to a railfan in Cullman, AL, this crossing has had the General Signals e-bell replaced with a WCH mechanical bell (that's painted black with a gold gong, interestingly enough). He also sent me this photo of the signal for proof:

Photo by Noah Chappell.
This isn't the first time I've seen CSX do this either. This crossing down in Pascagoula, MS used to have a Safetran Type-2 e-bell at it when Mike Kight took pictures of it for the site (though the page for it hasn't been transferred yet), but as you can see, the bell has since been replaced with this WCH m-bell:
https://www.google.com/maps/@30.3678058 ... 6656?hl=en
It also makes a bit of sense as to why CSX would choose to do this though, as the e-bells that they've been using lately have been Safetran Type-2/NEG e-bells, which aren't very loud at all.