LEGO Yellow Minifigure Head with Round Glasses, Brown Beard and Raised Right Eyebrow (Recessed Solid Stud) (13514 / 51521)

LEGO Yellow Minifigure Head with Round Glasses, Brown Beard and Raised Right Eyebrow (Recessed Solid Stud) has been used in at least 46 LEGO sets over the past 19 years, since it was first used in 2005. You can also find this part in at least 2 other colors. It has the design IDs 13514, 51521 which can usually be found molded into the bottom of the part.