Bachmann Class 24 Chassis DCC sound

Bachmann Class 24 (BR Blue) DCC sound chassis (no buffers) with decoder and speaker. Came to me as part of a job lot.

I don't use DCC or sound but it runs fine on my analogue test bench. Wiring is slightly untidy and the contacts on the cab units need adjusting so they make proper contact with the metal strips on the chassis as the lights are working but erratic.