I have extracted a pair of KEF B139 drivers from some unloved vintage Radford cabinets. They look as if they have been in there for 40 odd years, but they are different, in that one has a rubber cone surround and one has an impregnated cloth surround. I will post pictures when I can, but I have two questions initially.

1. Was the KEF B139 ever made with impregnated cloth surround or is this likely to have been a very early repair?

2. I have read somewhere that Radford commissioned their own lightweight cone B139s. Is this true?

Thanks