D Note horn for 68 Riviera

Seeking a D Note Delco-Remy horn for my 68 Riviera.

 

Which horn is "D" ?

 

Got a 68 parts car. I can check when I get back from vacation.

 

For cars with the 4 horn option, it is the snail shell looking one mounted to the underside of the hood with the trumpet

 

Ok , dont have any cars with that option.