11-5 BC. and later, Augustus, Dupondius or As, countermarked in Haltern, Germania, cf. RPC 523.

Augustus, irregular German or Gallic(?) mint imitating the Nemausus type, countermarked in Haltern/Germania, struck ca. 16-10 BC., countermarked 11-5 BC.,
imitative Æ Dupondius (or As ?), (24-25 mm / 6,88 g),
Obv.: [IMP / D]IVI F , heads of Agrippa (left, with rostral crown) and Augustus (right, bare-headed), back to back; to r., square countermark IMP ( {MP} ligate) - "IMPeratoris". - têtes adossées d'Agrippa coiffé de la couronne rostrale à gauche et d'Auguste nu à droite.
Rev.: CO[L - NEM] , crocodile [chained to palm tree, above palm, a wreath with long ties, two palm branches below]; circular countermark on cocodile´s head: I{MP} and above lituus ( {MP} ligate) - crocodile [enchaîné à un palmier qui est surmonté d'une couronne ; sous le crocodile, deux palmettes].
RPC I, 153, 523 var. (144 pieces listed) ; RIC I 155-7 var. ; LT. 2778 var. ; SNG Cop. 696-8 var. ; SNG Tübingen 142-51 var. ; Chantraine, Novaesium VIII, 35 ; Giard, Porte-Haliguen 136, 48 ; Berger, Kalkriese I, p. 49f .
For obverse countermark: Werz p. 379, subtype 107.8/8 (5 countermarks) ;
For reverse countermark: Werz, p. 402ff., no. 110 ; Martini Pangerl Collection 17 .

The weight-peaks for regular dupondii of this issue are 14 - 11 g (RIC), 12,50 g (RPC I).

the terminal coin of the Varus battlefield