I bought a Parker 25 with no converter included and was wondering which one should I put in it to be 100% "genuine". Does it originally come with a pressac? Like in this one here:
Parker 25 on eBay
Anyone?

Whilst I cannot state categorically that they never came with that filler
the ones i've had look like this25 filler

Mine came with a pressbar converter when it was new.

Edit for clarity That is it was like the one in the first link, not the second

I've had 2 Parker 25(1979-80' years),a steel finish and other one Black finish,both had this kind of converter:

Nevertheless I've seen converter with a pressac like yours in others Englishs Parker pens.,
Regards,
René.

Thank you all for your answers. Like I suspected, there is some variety and there is no "only right" type that was used.
I have a spare pressac and also some converters like the one Mr.Rene mentioned do I'll choose between these two

Mine came with the same filler as René. The P25 was the 'thing to have' when I was at school, and all of the ones I saw came with the same filler.

Regards

Richard.

I used a 25 as one of my school pens in about 1984/85(I was rotating my fountain pens even then....). It came with a pressac as in your link, finansista. A friend had a matte black one (if Parker didn't make a 25 in that finish, he'd have painted it himself), and that also had a pressac.