Brand: Colleen P.Co., LTD.
Made in: Japan
Very popular in Japan...use of Vermilion...most common I've seen is the Blue and Vermilion combo. This one is JIS approved on the reverse.
Founded in 1916, Colleen liquidated its assets in 1997. At one time it was considered one of the big three Japanese pencil manufacturers. Interesting to note that in 1982 Colleen flipped its triangular-shaped logo from right to left, and also changed its logotype to a round gothic font.