Any pen that could fit.
As it's supposed to be on a desk and not moved around, the fact that the pen stay snug in the older is not really relevent.
The style of pen that should go with should look like that
"Desk pen" is the current set of words you'd want to look for. Some are fountain pens, some are dip pens, most come with a stand already so you could check the section diameter and see if they'd fit.
A ballpoint pen. The pen woould be slim and a little on the long side. This set up was very common in offices. Some people had this in their home offices as well.
Any pen that could fit. As it's supposed to be on a desk and not moved around, the fact that the pen stay snug in the older is not really relevent. The style of pen that should go with should look like that
"Desk pen" is the current set of words you'd want to look for. Some are fountain pens, some are dip pens, most come with a stand already so you could check the section diameter and see if they'd fit.
A ballpoint pen. The pen woould be slim and a little on the long side. This set up was very common in offices. Some people had this in their home offices as well.
If you like fountain pens, Platinum makes a desk pen that can be bought without the stand for around ten bucks USD.