Well, it’s a weird name… you’ve got to admit.
Firstly, why did Colleen choose “Jib”? It’s a sailing reference, I think. The jib sail is a large prominent sailcloth that billows out in front of the vessel to give it a boost in speed when good tailwinds are in play. ←— Whoops. I am in error. Thanks to @Kiwi-d for the correction.
The jib allows the sailing vessel to point higher into the direction of the wind itself and thus make more headway towards your destination. So, while not a dramatic billowing of wind catching, it is a clever device that enhances the tracking of a vessel. Still a positive metaphor for the efforts of Colleen’s products.
And then… well… recall the Colleen logo. A triangle with a face in it. A sailing jib is triangular in shape.
In that vein, had Colleen came up with a name variant, “JIBSON.” Now in the nautical lexicon there is no such name, but there is bosun, which is the lead supervisor of a deck crew. Maybe that was the inspiration? Also, there’s a classic cocktail drink called a “Gibson”, which is essentially a martini garnished with a pickled onion instead of an olive or lemon twist. Too close to call. 
Well, Colleen took it a step further, with “BIG JIBSON!”
Sounds like a large guy who plays football in high school. 
Here’s just a few colorways of the BIG JIBSON model, WK-555:
The light blue BIG JIBSON:
I don’t own one, so I can’t make any comments about the feel and function. Based on the design and materials in play, I’m guessing these were ¥500, ¥700, or ¥800.
EDIT: The purple example that was listed has a price sticker - ¥500!
The clip seems to be the giveaway. It’s a plain brushed straight clip press mounted into a plastic base, as opposed to crimped directly onto the body. (Although one nice touch is the lead size embossed on the top of the eraser cap). I’m thinking the straight body tube (with no contours or texturing) is plastic. I’m expecting the nose cone might be chromed metal, as Colleen typically uses metal for them in most of their pencils.
Colorway details: It seems the body is either black or a satin finish silver. The silkscreened pattern varies by color. Light blue and green have an open rectangular grid pattern. Purple has a larger filled in rectangular grid pattern. And then the navy blue and black designs on silver body have a grid of open circles. It seems to suggest that there were more colorways, as why would purple be alone with its design? And who knows… maybe there’s a grid of triangles too. Especially since Colleen has the triangular logo. And this company often uses red and orange colors, so we don’t see those in this collection of BIG JIBSON pencils.
If you own one, please comment. Thanks!
