ECW concepts & prototypes
Bristol SCX6P ECW Prototype UK-spec (B35F) '12.1954Produced in a single copy
![Bristol SCX6P ECW Prototype [UK-spec] (B35F) '12.1954](https://s3.wheelsage.org/format/picture/picture-thumb-medium/b/bristol/ecw/scx6p_prototype/bristol_scx6p_ecw_prototype_1_000000000fb209a8.avif "Bristol SCX6P ECW Prototype [UK-spec] (B35F) '12.1954")
![Bristol SCX6P ECW Prototype [UK-spec] (B35F) '12.1954](https://s3.wheelsage.org/format/picture/picture-thumb-medium/b/bristol/ecw/scx6p_prototype/bristol_scx6p_ecw_prototype_0048001202a801fb.avif "Bristol SCX6P ECW Prototype [UK-spec] (B35F) '12.1954")
Bristol SCX4G ECW Prototype UK-spec (B35F) '12.1954–12.1955Produced in 2 copies
![Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955](https://s3.wheelsage.org/format/picture/picture-thumb-medium/b/bristol/ecw/scx4g_prototype/bristol_scx4g_ecw_prototype.avif "Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955")
![Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955](https://s3.wheelsage.org/format/picture/picture-thumb-medium/b/bristol/ecw/scx4g_prototype/bristol_scx4g_ecw_prototype_7.avif "Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955")
![Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955](https://s3.wheelsage.org/format/picture/picture-thumb-medium/b/bristol/scx4g_ecw_prototype/bristol_scx4g_ecw_prototype.avif "Bristol SCX4G ECW Prototype [UK-spec] (B35F) '12.1954–12.1955")
WheelsAge.org '2005–pr.