2nd century, Gandhara, the Buddha and Vajrapani, stone, photo on Wikimedia , at the Museum für Ostasiatische Kunst in Colonia (Germany).
2nd-3rd century, Gandhara, Shakyamuni and Vajrapani, stone, private collection, photo on Lempertz .
Greco-buddhist sculptures usually depict Vajrapani with a muscly body, plain garments and no crown or jewellery. Acting as the protector of Shakayamuni, he stands by his side, brandishing a large thunderbolt in one of his hands and holding a club in the other.
He sometimes looks rather like Hercules (see explanations here and here). On this rare relief he wears the hide of lion over his head and shoulders, holds a thunderbolt in his right hand and a sheathed sword in the other.
On occasions he is given an impish look.
On others he looks like an elderly man with long hair, full beard and moustache.