Nope, and that is why I like them so much:
They are 3 way all paper cone, "concertinad paper surrounds, and (I am assuming) traditional glues etc.
They were well stored before I got them, in someone’s back room and unused since the mid 70s.
The only degraded parts were crossover capacitors (I assumed, they did benefit from a replacement crossover), some sellotape inside holding wiring in place, and some foam on the baffle board behind the grill cloth that had dried and turned to dust, once that was carefully hoovered out they are fine
Other speakers made then and soon afterwards (and ever since, it seems) were using stuff like foam surrounds, ferrofluid etc. all of which degrades after like 20 years.
I had a different pair since the 1980s of the same model, that had had a much harder life, I had a couple of those drivers repaired, but that was down to an amp that went bad and fritzed some voice coils, and they still worked fine too.
AS I’ve said elsewhere, I have a more modern set of Monitor Audio speakers, with active crossovers and bi-amping etc. etc.
…but I have been listening to this pair a lot more the last couple of weeks, and they make a sweet sound and are very enjoyable to listen to
(50 year old) speakers rule, at least untilI can afford to spend multi-ks on something new, which is, frankly looking less and less likely
I’m very glad I have them!