Hi! My name is Javi and I’ve found an old bike (i think 1920’s or 1930’s) in a very well condition, but the brand is almost deleted. What I know is that the saddle is a dunlop one (rubber), the hubs are Sturmey Archer 3 speed with drum brakes (model KB 4) and frame number is “RU 4638”. Could anybody help to find at least the brand? Thank you very much!!