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.
An AE Decassarion struck 253-268 AD in Perge
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

Diameter: 29.5 mm
Die Orientation: -
Weight: 13.7 g
No notes for this coin
SNG BN 574; SNG von Aulock 4727; SNG Cop 357
An AE Decassarion struck 253-268 AD in Sillyum
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

Diameter: 33 mm
Die Orientation: -
Weight: 20.5 g
No notes for this coin
obverse: SNG RIGHETTI 1320; SNG v. Aulock 4890; Lane S. 148, 44 reverse: SNG PFALZ 4 958 SNG France 1013; SNG von Aulock 4892; BMC 18 S169,22