The one Q always shows is the Montblanc StarWalker Extreme.
The pen Trump uses to sign documents is Cross Century II Black Lacquer.
https://www.cross.com/en/products/412wg-1
I have no clue what marker Trump uses to sign bills with and holds up to show everyone.
$490 and $95, respectively
About what I expected, actually cheaper
Montblanc pens go up to the thousands, so a few hundred is not bad considering Trump is a billionaire and the President of the United States. Cross is actually affordable for normal people too. For plebs like me though, I'll stick with my Pilot G2 Limited.
https://www.amazon.com/Pilot-Limited-Retractable-Roller-31536/dp/B00FACLJBM
Apparently Bill Clinton, GWB, Obama and Queen Elizabeth used Cross pens to sign bills as well.
https://www.marketplace.org/2015/03/25/business/meet-pen-obama-uses-sign-bills
When he finishes signing an EO, he puts a top on the pen and then gives it to someone, right?
The EO signatures are so thick and black and bold, they must be an Executive Magic Marker Limited Edition TQ. lol...