356-L: The 2008 Group Buy That Started Korean Custom Keyboards

On 13 March 2008, a KBDMania member posting as 엠삼아빠 put a notice on the free board. He had, he said, just phoned one of the site's administrators and been given permission to post it there instead of on the group-buy board. The group buy would open at midnight. Quantity: 60 units, "sadly." Then came a numbered spec list that would set the pattern for every Korean custom announcement since.

The product was the 356-L, a tenkeyless aluminum keyboard. The maker is better known by the nickname that members attached to the board itself: 응삼 (Eungsam), as in "응삼텐키리스," Eungsam's tenkeyless.

The spec sheet, 2008

Here is what 60 people signed up for, paraphrased from the announcement:

1. One donor board does it all. A Cherry G80-3491 (winkey) supplies the controller. The controller board is "plug and play": no extraction, no soldering.
2. One-piece design. Everything fastens to the top housing.
3. No LED holes in the housing. Caps Lock and Scroll Lock LEDs are wired directly to the switches.
4. Step sculpture 2 built into the housing itself, with a 1.5 to 2 mm height difference front to back.
5. German raw material.
6. An anodized metal frame, glass-sanded and anti-dust coated.
7. A PCB with wider solder points, dust protection, and reinforced copper.
8. A matte black finish "like production keyboards."
9. Custom switch stickers.
10. A dedicated hardwood palm rest in black, resistant to shock, warping and humidity.

Read that list again with 2026 eyes. Integrated typing angle, no visible LED cutouts, a one-piece case, a matte anodized finish, a numbered spec post with the quantity up front: the grammar of the Korean custom was there on day one. The comments underneath are the other half of the grammar. "Finally," wrote one member. "Do I have to sell keyboards for this?" wrote another.

Delivery day

The boards shipped in the third week of April 2008. A thread titled "356-L delivery complete" went up on 19 April; two days later "Reporting 356-L arrival!" collected 55 comments. The member who posted it, 마티, wrote that the moment he opened the box the thought that stuck in his mind was "this is exactly it," and that because this was "a keyboard to carry for life" he would take his time with the build rather than rush it. The photo board filled with "356-L shots." A tips-and-tech post on extracting the controller from the donor Cherry appeared the same week, because of course some people wanted to do it the hard way anyway.

One member, slightly apart from the fuss, posted "While everyone is excited about the 356..." and announced he would quietly pick up a modified Wyse board instead. That, too, is part of the culture.

The 356-N and the move

In July 2008 Eungsam posted again, this time on the photo board, apologising for the delay on the 356-N, the non-click (brown-switch) version. He had assembled eight 356 boards himself in the meantime, he said, and spent the rest of his time playing billiards. If the sign-up count was small, he half-joked, they could hold an assembly meetup at the pool hall, eat Chinese food, chamfer edges and apply stickers together.

The same post contains the sentence that matters for history. The member group-buy board, where the springs and the 356-L had been run, was "temporarily closed," which he found "frustrating and worrying." The 356-N run would therefore be handled on a different site, ohbang.net. Ohbang became OTD, and OTD became the home of the 356 line and of a second Korean custom community. A 2009 Q&A thread on KBDMania asking what the relationship between the two sites was got a blunt one-liner from a member: "Daum and Naver... Auction and Gmarket... it's just another keyboard club." A longer answer in the same thread drew the line more carefully: KBDMania was centred on production keyboards like the Majestouch and Realforce, OTD on "the 356, LIMKBD and other projects, plus vintage Cherry and Alps," and most OTD members were KBDMania members too.

356CL, dark editions, and the first foreign question

By 2009 the line had grown. Photo-board posts show a 356CL in gun-metal (May 2009), in black (July), and a Dark Gray Edition (November). The community gave each its own nickname: 삼클 (sam-keul) for the 356CL, 닭클 (dak-keul) for the dark edition, 삼미니 for the 356 mini, and later a 356 pad.

In August 2009 someone posted "Some questions 356CL" on KBDMania's English board, which had opened only three months earlier. It is, as far as the archive shows, the first time an English speaker asked about a Korean custom on the site. It would not be the last.

What a 356 cost

Korean enthusiasts count in 점 (jeom), a slang unit meaning 10,000 won. A 2012 post compiling group-buy prices lists the 356 family as follows (unassembled kits, in jeom):

A 2010 post by a member who had sold his 356CL breaks down what a complete board actually cost him: kit 38, blue switches pulled from a Cherry M10 about 4, a group-buy set of doubleshot beige keycaps 6.5, a coiled cable 0.9, for a total of 49.4 jeom, roughly ₩494,000. He sold it assembled, minus the keycaps, for 41, and wrote that he regretted it. By then, he noted, "there seems to be some inflation in custom keyboards on the marketplace," because the runs were limited and demand was not. That argument never really ended. Part 3 is about it.

Why the 356 matters

It is tempting to read the 356-L as a Korean counterpart to the Western customs that appeared a few years later. The timing is the point: the announcement predates most of the English-speaking custom scene, and it already contains the elements that scene would later treat as canonical. It also contains the social template. A single member designs and fronts the run. The quantity is fixed and small. The community treats arrival day as an event. And the price, once set, is remembered and enforced by the people who paid it.