Horn and photo courtesy Brent Lee.
Most of the bells used in multichime Leslie Supertyfon horns could also be purchased individually as single note horns. The Leslie S-25, for example, is simply the Supertyfon #25 bell on a base. The #25 is also the largest bell on the S-3L and S-5T. The picture shows a very early S-25, with a bronze power chamber and two-piece bell.
Factory tuning is: B
The S-25 was sometimes used on switcher locomotives, or on road units as an
alternative to the A-200. The horn isn't common today, but can
still be found on some switchers and industrial locomotives.
S-25 sound samples:Sample 1...402kB...18 seconds