Dunhill Carbon Fibre Pens

[celestequattro]

Hi

I've got a couple of Dunhill carbon fibre pens - one fountain pen and one ball point (with a rollerball refill in the box).

I thought that they were both AD2000 models but no longer sure that this is the case, or if the ball point pen is an AD1800.

Can anyone shed any light on this please and how I can tell the difference?

Thanks.