6R Leather Barrel Pen Crocodile Black and Lead Grade Display Pen Case: Hands-On Review

Introduction

6R is a young leather goods brand built around a simple idea: products should last a lifetime with you. Every piece is hand-stitched by skilled artisans, and the brand name reportedly draws on the German word for fate, chosen with the hope that encountering 6R products brings good fortune. Having just celebrated its first anniversary, the brand is already producing writing accessories with an unusual level of material dedication.

We spent time with two of its standout pieces: the 6R Leather Barrel Pen in Crocodile Black and the Leather Pen Case with a lead grade display window. Both arrive in packaging that builds genuine anticipation, and both delivered surprises during real use.

Unboxing and Presentation

The experience starts before you even touch the products. Each item ships in a paulownia wooden box bearing the brand logo, tied securely with a cord. Craft paper sheets included in the delivery box act like a product card, detailing the materials used. It is the kind of packaging that makes you slow down and appreciate what you are about to open.

The pen is priced at 33,950 yen including tax, and the pen case at 15,950 yen including tax. Both are available from the 6R online store.

The Leather Barrel Pen: Materials and Craft

The Leather Barrel Pen in Crocodile Black is the top-of-the-line model in a lineup that offers four leather types: Nume, Pueblo, Premium Nume, and Crocodile, each with various color options. What sets the Crocodile version apart is that it uses genuine crocodile skin, not cowhide embossed with a crocodile pattern. The brand only sources the highest quality hides, which means the model is not always available for sale.

According to the included material documentation, crocodile skin barely changes with age and is described as the rarest of the rare, the jewel of leathers. It is highly valued, extremely difficult to work with, and treated as a precious material. Unlike other leathers in the range, the Crocodile version carries no logo stamp, letting the hide speak for itself.

The stitching is arguably the defining feature. The barrel is wrapped in leather and stitched together with fine, dense stitches over a narrow area, creating a beautiful seam. The thread itself is a woven construction of dozens of polyester fibers, finer than standard twisted thread, finished with a wax-infused treatment for durability. It feels more like resin than thread to the touch, shows no fraying, and resists moisture, which suggests long-term reliability. The top hole is flattened to prevent unraveling, and small individual variations in the leather grip are barely noticeable in use.

Hardware and Build Details

The grip section and tip are metal, apparently brass, updated to a new hardware type in April 2024. The pen tip is a traditional pipe-slide type rather than a guide-pipe type, but the gap has been narrowed to the absolute limit, so there is no wobble. Inside, the lead tank is resin and the chuck that feeds the lead is metal.

The knock feel is slightly firm with a light click sensation, and the clip has a softer tension. The knock cap includes an eraser but no cleaning pin for clearing lead jams. Center of gravity sits near the middle of the pen.

The Crocodile Black measures 139mm in total length, weighs 22g, and has a barrel diameter of 10mm.

Writing Experience

In use, the pen delivers what the materials promise. The weight and stability feel spot on, there is satisfying tactile feedback from the knock, and the writing itself is smooth and comfortable. The knock cap wobbles slightly when touched directly, but never felt loose during actual use.

The main drawback noted during extended use is that the clip can press against the hand while writing, which is a minor annoyance. It is also worth noting that the pen uses existing hardware parts, so the metal design does not feel especially new. Developing original hardware is a significant challenge for a young brand, which makes the fact that 6R developed an entirely original pen case all the more impressive.

The Pen Case with Lead Grade Display Window

The Leather Pen Case is wrapped in leather over a brass case, in the tradition of classic Swiss pen cases. This example is in the Oliva color of Pueblo leather, pairing brown and green to striking effect. It feels slightly larger than similar cases of this type, with some thickness from the leather wrapping, and holds over 50 pieces of 0.5mm lead. It measures 78mm long and weighs 26g.

The standout feature is the lead grade indicator window. Lead cases with grade indicators have existed before, but none where the display could be changed. Here, you remove the cap, take off the top part, and align the window with the refilled lead grade. Both screws use O-rings, so they will not come loose on their own. The grades available are 2B, B, HB, F, H, and 2H, all laser-engraved and clearly visible. The inclusion of the rare F grade reflects the brand’s personal preference and desire to recommend it to others.

One minor gripe: after changing the indicator, the window is not always centered when you close the lid. You can bring it to the front by closing it loosely, but there is a small risk of contents falling out, which is an area that could use improvement.

Overall Buying Advice

These two products suit different needs. The Leather Barrel Pen in Crocodile Black is for anyone who wants a writing instrument with genuinely rare materials and meticulous hand-finishing, and who is comfortable paying a premium for it. The stock B lead suits the pen well, though fans of softer leads may wish harder options were standard.

The pen case is the more approachable purchase and the more original design, ideal for anyone who rotates between lead grades and wants a case with real character. Note that the current lineup does not include a 4B indicator option.

Both pieces reflect a brand that clearly cares about materials, detail, and presentation. For a company barely past its first anniversary, the level of commitment is genuinely impressive, and it will be interesting to see what comes next, whether an original metal design or even a ballpoint pen.

Conclusion

The 6R Leather Barrel Pen and Leather Pen Case with lead grade display window make a compelling pair for stationery enthusiasts. The pen delivers rare crocodile leather, refined hardware, and a comfortable writing experience, while the case introduces an original, adjustable grade indicator in beautiful hand-stitched leather. Small flaws exist, but the passion behind the products is evident in every detail, from the waxed stitching thread to the wooden presentation box.