The Decassarion denomination
The decassarion was a bronze denomination worth 10 asses - assarion in Greek.

It was commonly struck by Roman Provincial mints, and was not struck to a standard weight but rather to some local standard. It was simply a coin worth 10 of the local basic coin denomination.
Decassarion

(1) Gallienus 253-268 AD
Obverse: Laureate, draped and cuirassed bust right; AVT KAI ΠO Λ_I_ΓAΛΛIHNOC CEB
Reverse: Tyche standing half left holding rudder and cornucopia; ΠEPΓ_AIΩN
Ref: SNG BN 574; SNG von Aulock 4727; SN...
(2) Gallienus | Salonina 253-268 AD
Obverse: Radiate, draped and cuirassed bust of Gallienus left , confronting laureate and draped bust of Salonina right; AV K ΠO ΛI ΓAΛΛIHNOC / I
Reverse: Tyche standing half left, holding rudder and cornucopia; CIΛΛ_V_EΩN
Ref: obverse: SNG RIGHETTI 1320; SNG v. ...