The Argenteus denomination
The argenteus was a silver coin produced by the Roman Empire from the time of Diocletian's coinage reform in AD 294 to ca. AD 310. It was of similar weight and fineness as the denarius of the time of Nero. The coin was produced at a theoretical weight of 1/96th of a Roman pound (about 3 grams), as indicated by the Roman numeral XCVI on the coin's reverse.
Argenteus

(1) Constantius I 294-295
AR Argenteus Unknown mint
Obverse: CONSTANTIVS CAES, laureate head right
Reverse: VIRTVS MILITVM, four emperors sacrificing at tripod altar before walled enclosure with six turrets
Ref: None provided
(2) Diocletian 294 AD
Obverse: laureate head right; DIOCLETI_ANVS AVG
Reverse: tetrarchs wearing military dress, sacrificing over tripod in front of turreted enclosure with gate; VIRTVS__MILITVM / A
Ref: RIC VI 40a; RSC 516g
Obverse: DIOCLETIANVS AVG, laureate bust right
Reverse: PROVIDENTIAE AVGG, the four Tetrarchs (Diocletian, Maximianus, Galerius and Constantius) sacrificing over tripod before campgate with six turrets
Ref: RIC VI 10a
(4) Maximian 295 AD
Obverse: laureate head right; MAXIMIA_NVS AVG
Reverse: tetrarchs sacrificing before six-turreted enclosure; VIRTVS_MILITVM
Ref: RIC 18b; RSC 622d
(5) Maximian 295-297
Obverse: MAXIMIANVS AVG, laureate head right
Reverse: VICTORIA SARMAT, tetrarchs sacrificing over tripod before city enclosure with six turrets
Ref: RIC VI 31b, RSC 548f