Most pontils are associated with handmade marbles. Some with "transitionals", which may be machine-made.
One tricky thing is recognizing whether something actually is a pontil. Some machine-made marbles have cold-roll marks or damage which may be mistaken for pontils.
The top marble is an Akro Popeye. That's a type of corkscrew from the 1930's. It's a popular marble. Yours is damaged. Of course that affects value.
The bottom marble is a contemporary handmade marble. Do you see a signature on it? (Someone's initials?)
The middle one is tricky. My first thought based on colors was Peltier, but the structure is wrong for the marble type I was thinking of. I'm starting to think Jabo for it. The kind made in 2008 or later. How much sparkle in the green chunks? They could be aventurine or mica.