From the season 6 finale "Who Shot Mr. Burns"

Burns: Ahoy, there, Dean. Well. me and my fourth form chums think it would be quite corking if you'd sign over your oil well to the local energy concern.

Skinner: It was naive of you to think I would mistake this town's most prominent 104-year-old man for one of my elementary school students.

Size - 40x28mm

Stainless steel chain included