Crawford 238/1, Roman Republic, L. Antestius Gragulus, Denarius.

Roman Republic, Rome mint, moneyer L. Antestius Gragulus, 136 BC.,
AR Denarius (18-20 mm / 3.80 g),
Obv.: head of Roma right in winged helmet with griffin crest, mark of value XVI monogram (= 16 asses) under chin, GRAG behind.
Rev.: Jupiter in quadriga right, brandishing thunderbolt with r. hand and holding reins and scepter in left, L. ANTES. (ANTE in monogram) under horses, ROMA in exergue. Cr. 238/1 ; Syd. 451 ; RSC Antestia 9 .

The first use of the new denomination mark for the re-valued denarius (now 16 asses), the star-shaped monogram of XVI (the number 16).