Brand: Eagle Pencil Co.
Made in: USA
From what I can tell this pencil came equipped with the pocket clip. There is an Eagle logo on the clip itself. I have seen at least one other pencil called Cliptic from Eberhard Faber that comes with one.
The company was originally founded in New York City by the Berolzheimer family, and in 1969 became part of Berol Corporation. Berol was purchased by Empire in 1986, which was purchased by Sanford in 1995 (which is today a division of Newell Brands).