KEF: Their Concerto speakers – help requested

Hi I have a pair of Kef loudspeakers, the baffle and drive unit assemblies look exactly like the Concerto's but the cabinet dimensions are bigger 75x47x37 cm's hwd, they are also finished in cream leather with white grills and a crome surround. The b139's bass units have quite a wide alloy surround which i notice some don't have. I am hoping someone may have some information regarding these speakers. Many thanks John

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