Ratio 553 Signal Box Interior 00 HORatio Lineside Kits OO HO Signal Box Interior Adds the finishing touches to any signal box (See Ratio 500, 503, 536, 552 and Wills SS48 kits); it contains all you need to fit out a typical signal box including a 20 lever frame and a level crossing operating wheel. Glue and paints required to complete model. Ratio 00 Signal Boxes Ref nos 552 536 503 and 500 Wills 00 Signal Boxes Ref nos. SS48 and SS29 All 1: 76 Scale Model Railways and Modelling