Antoninus Pius, Rome mint, 139-144 AD.,
Æ Dupondius (28-30 mm / 10,10 g),
Obv.: [ANTONI]NVS - AVG PIV[S] PP , radiate head of Antoninus Pius right.
Rev.: [TR POT] - COS [III?] / S - C , (goddess standing r.) .
cf. http://www.forumancientcoins.com/gallery/albums/userpics/17774/normal_2012-07-15_2.jpg .
"otlichnik": " These coins are called "Soldatenmünzen" (soldiers' cons) in German and are believed by some scholars to have been nailed to standards. However, there is also archeological evidence that they were nailed to shields and there are photos in Dr. Fischer's recent book on the Roman Army of two coins attached to an iron lame of lorica segmentata armour."