Available now from Steam Sounds Supreme the add-on pack for the Standard 9F pack gives you the 10 engine class of the modified 9F's for the Franco-Crosti experiment, and the aftermath when the additional boiler and piping was removed.
- British Railways 1955-56 Livery
- Franco-Crosti (no deflectors) - Clean
- Franco-Crosti - Clean and Worn
- British Railways 1956-68 Livery
- Franco-Crosti - Clean and Worn
- Ex Franco-Crosti (1959-67) - Clean and Worn
The pack comes with a unique sound set created with relevant available recordings
