Sheaffer Legacy Rollerball Question

[Paul-H]

Hi all

I have been browsing the BayofEvil for a Legacy Rollerball to complete my set and keep seeing ones like the example here https://www.ebay.co.uk/itm/Sheaffer-...d/173772493330
As you can see it has the blind cap of the Fountain pen but then there are also many examples on there that don't have the blind cap.

Here is an example without the blind cap

https://www.ebay.co.uk/itm/Sheaffer-...S/333105393939

So what's the story with the blind capped Rollerball's were they made like that or are they fountain pens converted to Rollerball.

Thanks for any input on this

Paul