Antoninus Pius Dupondius.

ANTONINVS AVG PIVS PP IMP II, radiate head right.
TR POT XIX COS IIII SC in four lines within wreath.

RIC 951-953 ADD (unlisted as dupondius)

Seller: 	CHS Basel Numismatics
Price: 	114.99 EUR

This is probably the first coin of this type to find its way
online, from early 1999.