Just a quick rough and ready version of a famous photo so I didn't fuss too much about the details.
Graphite on Bristol Vellum paper.
32cm x 24cm.
Approx 8-10 hours I'd guess.
Staedler 9B, Derwent 9B, 6B, 2H. Pentel mechanical pencil HB.
Cotton earbuds & tortillons.
Mono Zero & putty erasers.