OHTO Super Promecha vs OHTO MS01: Two Similar Drafting Pencils With Very Different Characters

Introduction

At a glance, the OHTO Super Promecha and the newer OHTO MS01 could pass for the same pen. Both come from the same Japanese maker, both target drafting and precision writing, and both carry an identical feature list. Spend a few minutes with them, though, and the differences start to show: one leans matte and classic, the other glossy and refined, and the small changes between them affect feel more than you might expect.

This comparison walks through what they share, where they differ, and which one suits which kind of writer.

Shared Features: The Same Toolkit in Both Pens

Functionally, these two pencils are twins. Both offer:

• Adjustable lead advance, controlled by a dial that sets how much lead the knock feeds out
• An adjustable guide pipe, so you can change how much of the pipe extends past the lead
• Retractable pipe, letting the guide pipe be fully retracted for safety and pocketability
• A detachable construction for cleaning and maintenance

Because the feature set is identical, the buying decision really comes down to execution: finish, ergonomics, weight, and writing balance.

Finish and Design Differences

The visual differences are subtle but numerous. The Super Promecha has an all-matte, machined look with a satin anti-glare finish across the body. The MS01 goes the other way: the nose cone, knock cap, and clip are plated, and the barrel carries a glossier coating that catches the light.

Typography differs too. The Super Promecha’s barrel branding uses a bold, gothic-style font, while the MS01 opts for a noticeably thinner typeface. The Super Promecha also includes four rubber lines running along the barrel as a design accent, whereas the MS01 keeps the body clean and simple.

Small functional details diverge as well. The lead-advance dial is wider on the MS01, which makes it easier to turn; the narrower dial on the Super Promecha can be fiddly. The printed instructions on the barrel switch from a diagram on the Promecha to text on the MS01. Both pens use a knurled clip ring to adjust guide pipe length, though the Super Promecha’s rotation felt smoother in use, possibly a unit-to-unit variation. The MS01’s knock cap gets plating over the hairline finish, and its top drops the weight markings in favor of a slightly recessed design. Removing the knock cap reveals an eraser on both, but only the Super Promecha includes a cleaning pin. Finally, the Super Promecha’s cap is longer, giving the whole pen a greater overall length.

Weight, Balance, and Dimensions

On the scale, the MS01 comes in at 27.3 g, roughly 2 g heavier than the Super Promecha. Both are low-gravity pens by design, but the Super Promecha ends up longer and lighter overall.

That combination matters more than the raw numbers suggest. Low center of gravity is often treated as an automatic win for writing comfort, but weight and length have to be balanced around that low point. A pen that is low-gravity but poorly balanced still feels tiring over long sessions. The Super Promecha is unusually well judged in this regard.

Writing Feel and Balance

Writing with both back to back, the difference is real but modest. Neither pen is bad; both deliver a confident, precise drafting feel. The clearest distinction is balance: the Super Promecha’s weight distribution feels better judged during longer writing sessions, while the MS01 felt slightly heavier in hand.

One quirk both pens share is a faint rattling sound from the cap area while writing. It is present on both, but the Super Promecha’s noise was noticeably quieter.

Overall Buying Advice

Choose the Super Promecha if you value balance above all. It is longer and lighter, its matte machined finish has a classic tool-like character, and it includes a cleaning pin, which is genuinely useful for a pen with a retractable pipe mechanism. Its downsides are a narrower, harder-to-turn lead dial and slightly more cap rattle.

Choose the MS01 if you prefer a more compact, polished look and easier adjustments. The plated, glossy finish reads more premium at first touch, the wider lead dial is a genuine improvement, and the simplified cap design is cleaner. The trade-offs are a bit more weight, no cleaning pin, and a balance that felt slightly less dialed-in during writing.

Conclusion

These two pencils look like siblings, and they are, but the execution differences tell two different stories. The Super Promecha rewards writers who care about balance, low weight, and a matte, understated finish. The MS01 rewards those who want a glossier look, easier dials, and a more compact body. Neither is strictly better; each refines a different part of the same idea. Match the one you pick to what you actually notice when a pen is in your hand for an hour, and you will be happy either way.