Roof rail Seal

I have a '64 and would have thought from 64-66 would be the same? I have heard there are LOTS of little differences between 63 and the 64-66.
I have also discovered a similar situation with rear windscreen rubbers, sellers seem to list one for 63, nothing at all for 64, and list another one for 65-66. I have no idea what the difference would be between 64 and the 65-66 rear screens, so I bought a 65 rubber and it seems to fit (or is less leaky than the original one)...