Tash and Ancient Squipper are correct.
However all the mouldings were made at Camberley Rubber irrespective of who the Design Authority is/was. (NGL/Meggitt/MEL/RFD Beaufort etc. etc) quite a Pi55ing contest between them all a good while back. Hope the dust settled.
As for PNs Conk- All I can say is it must run in the family!!