Seeking Help Identifying A Ballpoint Refill Model

[Intensity]

I have a nice little ballpoint pen I got as a gift from a relative many years ago, with a twist-to-extend/retract mechanism. The ink cartridge in it has long been finished, and I've been meaning to figure out what to get as a replacement cartridge. Unfortunately there is absolutely no writing anywhere on the pen or the refill. But I do see something that appears to be "C17" embossed at the very top of the black ribbed cap on the refill. In case anyone is familiar with ballpoint--or even better gel--refills that have this size, I would love a pointer! Perhaps I could even twist off that black cap and fit it onto another metal or plastic cartridge to preserve the twist-to-use mechanism.

 

 

[usk15]

This one looks like a Cross standard refill:

 

https://www.cultpens.com/i/q/CR41125/cross-ballpoint-pen-refill

 

 

Also you can remove the black end and adapt some other slim plastic refill, obviously adjusting the length.

[Intensity]

Excellent, thank you! Do you know if there are gel refills in this size?

[usk15]

Try Monteverde: http://www.monteverdepens.com/new_refill_page.html

 

Not sure.

[Intensity]

Thank you.