Tri-ang Hornby R39 Class B12 Non Motorised Tender - Chuff Chuff Box Only (#472) Please find for sale a Hornby R39 LNER non motorised tender chuff chuff box with sound arm. (Only) The box is in good used condition with no obvious damage. Also includes the sound arm which only shows signs of light use. Please note you will also need a sound clip which is attached to the wheel axle. (Not included) These were also fitted in the Flying Scotsman, Princess, Britannia, Mallard, Hall Class and B12 locomotives. Please see all photos to help with description. Please see Badrocks Model Trains eBay shop for more listings. Thank you for looking.