Product Code TW-M7443110
In Stock, Usually Ships in 1 to 2 Business Days
The Diamond 580 comes with a benchmark piston ink-filling mechanism and has all detachable parts. Clear demonstrator with an extra-fine stainless steel nib.
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TWSBI Diamond 580 Fountain Pen - Clear, Extra-Fine

The Diamond 580 comes with a benchmark piston ink-filling mechanism and has all detachable parts. Clear demonstrator with an extra-fine stainless steel nib.

These pens come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance.

Usually Ships in 1 to 2 Business Days
Fountain Pens
Pen Model
Body Color
Body Material
Cap Type
Compatible inks & refills
Bottled inks
Filling Mechanism
Grip Material
Nib Color
Nib Material
Nib Size
Diameter - Body
Diameter - Cap (without clip)
Diameter - Cap (with clip)
Diameter - Grip
Length - Body
Length - Cap
Length - Nib
Length - Overall (Closed)
Length - Overall (Posted)
Weight - Body
Weight - Cap
Weight - Overall
Max Ink Capacity - Piston/Vac
TWSBI Diamond 580 Fountain Pen - Clear, Extra-Fine is rated 4.4706 out of 5 by 34.
Rated 1 out of 5 by from Pretty high failure rate First 580 I liked. So, I ordered 2 more for different colors. Second 580 has an inexplicable leak. Third 580 suffered nib failure with the nib bowing upward so that light is visible through the breather hole. Granted, used the third 580 a couple of times for 3 page carbonless copy forms, but this failure mode is not consistent with "sprung" nibs. The nib tip is not bent upwards. More of an arch that runs the length of the nib. Thinking it's a manufacturing failure. At first really liked the 580 (which is why I bought two more), but a failure rate of 66.6% is a little disheartening. Time to find out how TWSBI's customer support is.
Date published: 2014-10-20
Rated 5 out of 5 by from TWSBI 580 EF Well i've been using this pen for almost a day and i have to say that i love it. Writes a wet thin line that was what i was looking for. It's thinner than my extra fine lamy safaris (got two) and about as wet as they are; the line really is a little thicker than my fine sailor 1911, but not much. The nib is smooth on the paper with some feedback (it's an extra fine nib). The pen looks gorgeous, feels solid and holds a lot of ink. a great writer for long sessions. By the way, the service at Goulet Pen Co, is awesome. A very satisfied customer.
Date published: 2014-10-20
Rated 4 out of 5 by from Really good pen for everyday writing I've been using this pen for a few weeks or a month... I can't remember lol. Regardless, I really do enjoy using this pen, and I've found myself taking it to work almost every day. I do a lot of writing at work, so having a nice pen really makes things more pleasant. I've kept it inked with Liberty's Elysium since day one, and it's a great combination. It's a pen that's really nice, and a step or two up from a Metro or Safari, but it's not so expensive that I'm constantly worried about taking it to work. I tend to leave my Custom 74 at home, whereas I have no issues toting the 580 around with me with little concern. I will say there's a little more feedback that I was used to when I got it. I ended up smoothing it out just a bit, and it's perfect.
Date published: 2016-11-21
Rated 5 out of 5 by from Solid pen Though this ex-fine isn't as fine as my vanishing point ex-fine, it still lays down a solid thin line suitable for my tiny writing. It starts every time I put the nib to paper, feels great in the hand, and the only reason I'd think to give it four stars (I'm giving it 5) is because I can't post the cap. However, since I don't post the cap, it's not an issue for me. The tinkerer in me can disassemble the entire pen, which I've done many times in the short period I've had it and there's been no issues. The ink volume this pen has is a huge bonus. And the clear demonstrator aspect of it is just icing on the cake.
Date published: 2014-10-20
Rated 3 out of 5 by from Good pen but very scratchy When I first received the 580 EF the nib was unacceptably scratchy, constantly digging up a ball of paper fibres. Observation under a 10x Loupe revealed one tine was slightly longer than the other. I proceeded to apply some 2000 grit, 12'000 grit and finally Mylar paper (0.3,1um) to reshape and smooth the nib. Now it's glassy smooth. It would have been nice for it to write well out of the box so I deducted two stars. Other than that, the design of the 580 is lovely. Easy to disassemble, beautiful and functional. Overall the pen deserves a recommendation although quality control can be a problem.
Date published: 2014-10-20
Rated 5 out of 5 by from My first new fountain pen in 25 years. Wow. Lifelong fountain pen user; two Watermans for the last 1/4 century. My son talked me into the 580 TWSBI - and I'm very glad he did. It's definitely has different feel than I'm used to, mostly heavier, but it writes magnificently. There's a lot of elan in this pen. The F nib is noticeably "scratchier" than my Watermans but it's not really bothersome. The Diamine ink I use in it flows perfectly. I would mark it down 1/2 star because the top does not sit well on the top and dramatically changes the balance of the pen when writing. IMHO, best to set the top aside then. I would indeed recommend this pen most highly, the aforementioned notwithstanding.
Date published: 2014-10-20
Rated 5 out of 5 by from Cool pen & very comfortable I love my new TWSBI Diamond 580 extra-fine fountain pen, it is everything people have been raving about. It comes with a converter which makes the price appealing. Also it looks cool and is very comfortable to write with, un-posted. Posted it is a bit top heavy for my small hands, also if you post it be careful un-posting the cap and don't twist lefty-loosy as that will activate the piston converter. I have gotten positive comments from people who see me use it, as I said before this pen is cooooool! Goulet Pen people you rock. Now if I could make up my mind about ink colors as easy as it was to chose the TWSBI 580.
Date published: 2014-10-20
Rated 2 out of 5 by from TWSBI 580 It writes very well, and the service is exceptional, but there seems to be a problem with the construction. I have had two of these pens break on me, seemingly without cause, at the threads between the barrel and the feed holder. Service is excellent, and the first time I encountered the problem, the manufacturer sent me a replacement barrel and feed holder after seeing pictures of the damage. The second time, I simply did not get it fixed because I did not want to be carrying around a pen that had twice presented itself as a ticking timebomb to carry in one's pocket.
Date published: 2014-10-20
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