I've had this mechanical pencil for many years, it was a gift from my grandfather who has since passed away. The mechanical pencil is truly my favorite as it's sturdy, comfortable and premium feeling/looking. The body is aluminum and it is branded MΔRBAR on the side and has the Δ right over the clip again. I'm fairly sure that isn't the pencil's brand but rather some promotional thing, but I don¡t rightly know.
I'm attaching a few pictures to help this along. Any help at all will be greatly appreciated!
PS: Yes, I just noticed the state of my keyboard in the pictures and I promise I'll clean it today hahaha