Not really Keith Richards or Ronnie Wood but...either would do. Technical pen on 18x24 illustration board. I was buying a lot of illustration board back then...Late 70's?
Digital is great -- for composition and color. But for line art? I don't think I can ever give up the fountain pen. This was drawn with a Sailor King of Pen (M) and Sailor 1911L (EF) fountain pens using Pilot Black ink. Yes, sacrilege. Pilot ink in a Sailor. But I have some Kiwa Guro arriving soon!
I drew these guys with a Pilot Custom 823 FA and Platinum Carbon Black ink. The FA nib has a good drawing width on watercolor paper - one of my favorites. It's a soft nib but I don't use the line variation, just some nice shock absorption with each downstroke. The Carbon Black ink is out-of-this-world good, though being pigmented I fear keeping it in too many pens.