Brand: Tombow Pencil Co.
Made in: Japan
Oooh, 05's in the house! Tombow put out quite a few variations of the mono in the 70's-80's. The design series will have an 01, 02, 03, 04 and the newly discovered 05.
This Japanese company was founded in 1913 and is still manufacturing fine writing instruments nearly 110 years later.
According to their website, “Tombow (tonbo) means “dragonfly” in Japanese and was often referred to as akizu/akitsu in ancient times. Since Japan was called Akitsu shima (dragonfly island in English) in the past, the name of the company also represents our desire to represent Japan's stationery industry.”