Classic Dunhill shapes that will accept 6mm filters?

[greatdane]

Does anyone know which classic Dunhill shapes (1960s and earlier) that will accept 6mm filters without any modification to the original stem?

Thanks in advance.

 

[Sea Lord]

Weren't they always bored at 3 or 4mm (excepted for the 9mm filtered ones, of course)?

 

[ssjones]

I believe 9 mm filter pipes were introduced in the late 1980's or early 1990's. I don't think they ever made a 6 mm filter pipe.