I have a couple of TWSBI 580's plus some other pens.
Was interested in getting one more (yes, I know) pen that was a piston filler and was wondering if anyone knew of any (not another TWSBI, I need some more variety) where the section would unscrew so that you could use the snorkel/apparatus from the TWSBI bottle for filling like with the 580's?
Thanks in advance!
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