Hard to find, new old stock chassis mount Mazda Octal type ceramic sockets. These ONLY fit certain British tube types that use a Mazda Octal base (like SP41, SP61, PEN25) they are not interchangeable with standard octal sockets. Price is per socket. Shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
Many tubes that fit in these sockets are nice NOS British stock of types that are equivalents of 9 pin and standard octal types that are usually much more expensive ).