There Are Pandas, and Then There Are Pandas.
And this isn't either of them! The Pandas we're talking about here, are watches, not bears. And what got me thinking about them (again) was a link posted this morning by @cm.rook who pointed a few of us to the very attractive (and not terribly priced) Yema "Rallygraph" Panda which, in it's most traditional arrangement, looks like the one on the left, but can also be had in the version on the right: The model on the left is a true Panda, while the model on the right is called a reverse Panda. The reason for that distinction is clear--Panda bears, only come in the first arrangement. Now at this point, everyone should be thinking about the most well-know Panda, The Rolex Panda, which is actually a Daytona, and among Rolex Daytonas, the most famous of which is the Paul Newman Daytona, which was famous first, because it was Paul's, and second because it sold at auction for $17.8 million (US Dollars). The story of that auction is well-known so I'll only...
Nov 8, 2019
I think if this is priced far less than $50, you'll see this sell well. If you're aiming for the 50-dollar range, you may want to reconsider the internal fabric. https://www.amazon.com/Pilot-Pensemble-Pocket-Cowhide-Brown/dp/B005K7H7KE is example of what i have. I have 2 of them right now, and I trust the fabric not to mess up my pens at all, given how soft it is. I do like the zipper idea you have far more than the piece used by the pilot case.
edit: forgot about the fact I can attach images. Including an image of some more medium-ish pens inside the roll. Gives an idea of the spacing in the roll.
Amazon Link: https://www.amazon.com/Pilot-Collection-Fountain-Burgundy-60573/dp/B002Y2HDX4 Goulet Pens Link: https://www.gouletpens.com/products/pilot-metal-falcon-fountain-pen-burgundy
Sorry for the mistake, I read your original question wrong. I'm not 100% sure what pen that is, but I hit google images and typed the characters that were visible on that pen, and the closest I saw is:
https://www.shop-rikiki.de/en/Stationery/Tous-les-Jours-Ballpoint-Pen-Beige.html#
It appears to be the 5th one from the left (2nd photo), which correlates with the wording, color, and end structure.
So doesn't appear to be a fountain pen, but I did see mechanical pencils and ballpoints with this style while looking through google images. The exact phrase I used in google images is: "roman un poeme pen"
Most of my pens I have can't be used for calligraphy. For most types of calligraphy, you either need a very specific nib structure (to do Gothic-like styles), or are very flexible (to do something like Spencerian), or are bush in nature (for Kanji/Chinese Characters). Only 5 (types) of my close to 50 (type) pens can come close to that requirement. I use the word type above since some are part of a set, and I classify that as one pen - despite the fact it's physically more.
What Fountain Pens give you is versatility in ink choices, but also more enjoyment if you write a lot. I get far less hand fatigue with writing with Fountain Pens, and in my opinion it's a fun hobby. Pretty much no common fountain pens work well as a calligraphy pen. I use the word common here because most of the common pens are under the sub $100 range, and use steel nibs. They're generally very stiff, but can be very well constructed and a pleasure to write with. If you're interested in trying Fountain Pens, I recommend starting with a Lamy or a Pilot Metropolitan. They're generally cheap enough to see if using these pens is fun for you, yet decent quality to give a good accurate experience of what writing with Fountain Pens is actually like. Also, Goulet Pens (among other places) have ink samples. Could be a very useful to visit their site, pick out a good 10 samples that look interesting to you, and try them out. Just note that if you get into bottled ink, you need a converter for the fountain pen that you pick. These are generally pretty cheap to pick up.
If you're curious about the diversity of color/ink choices: https://imgur.com/xQMlydU is an picture I took some time ago of my ink setup. It's changed a bit since then, but this is just fountain pen ink.
If you're interested in Calligraphy specifically, I can post some information to help you get started. Getting into Calligraphy is a lower barrier to entry than Fountain pens since it's so much cheaper. But, it really depends on what style is of interest to you. Most of the calligraphy I do is Kanji/Brush Caligraphy. I do a lot of that. I don't have a lot online of my Calligraphy work. Closest I have is balance/memorization practice (https://imgur.com/TJ1KB4C)
That said, the price point of this pen is really cheap, and you're not out a whole lot. I've also heard good things about this specific pen. Pilot nibs seem to be more solid on QA in my experience, too. I've had some nibs that weren't great from the factory from other manufacturers, but not Pilot. Do note that at this price point, your nib isn't being checked by a real person. Machines generally check these pens, which isn't necessarily bad, but isn't great either. Really until you get to the mid 300-500 range, no nib you buy will be human tested.
The only thing cautioning on is that English and Japanese nibs differ in sizes. The differences are only til you get to Medium or so. But a Japanese Fine = Western Extra Fine. Japanese Medium is a little more broad than a Western fine. So it's worth gauging based off your existing pen. If you write small, get a Japanese Fine. If you write large, then aim for a Japanese Medium.