Lucas WT618 horn.

Alloy cast horn with domed top cover.
Very popular horn for vehicles from the vintage era up to the mid 1960s.
As factory fitted to Ford Consul, Zephyr, Zodiac, Triumph TR2/3/3A/3B, Rolls Royce, MG TD/TF, MG MGA, Jaguar XK120, Morgan, Austin, Lotus Elite, Rootes, Bristol, Morris etc.

Works! watch video. Never been rebuilt, all original.