Original portrait, pencil M Keller 1973 drawing on board Mcm retro vintage

I don’t know who this artist is I don’t know anything about this other than it’s pretty cool. Everything you need to know is in the pictures. It is priced accordingly because I don’t know who the artist is my loss your gain perhaps 🤔??? It’s just very cool. It would look really nice and mid-century modern vintage retro house. I just don’t have anymore. Space on my walls.