The Follis denomination
The follis was originally a large bronze coin with around 5% silver content introduced at the time of the coinage reform of Diocletian. It weighed about 10 grams.

Due to rampant inflation, the follis was quickly reduced in weight and by the time of Constantine it was a shadow of its former self and barely contained any silver at all.

The follis was reintroduced as a large bronze coin (40 nummi) in 498, with the coinage reform of Anastasius.
Follis

(1) Anastasius I 491-518 AD
Obverse:
Reverse:
Ref: None provided
(2) Constantine VIII 1025-1028
Obverse: + ЄMMΛ-HOVHΛ, barred IC XC across field, nimbate bust of Christ facing, holding Gospels
Reverse: + IhSЧS/XRISTЧS/bASILЄЧ/bASILЄ· in four lines across field; above and below; ornate As.
Ref: DOC class A2; SB 1818
(3) Heraclius 624-625 AD
Obverse: Martina (his wife) on left, Heraclius in center and Heraclius Constantine (his son) on right, standing facing, all crowned and wearing chlamys and all holding cross on globe
Reverse: Large M, ANNO at left, cross at top, B below, XVI at right, ΘEC in exergue
Ref: Sear 825
(4) Leo VI 886-912
Obverse: +LЄOҺ bAS-ILЄVS Rom. Crowned and draped bust facing, holding akakia.
Reverse: +LЄOҺ/ЄҺ ӨЄO ЬA/SILЄVS R/OmЄOҺ in four lines.
Ref: DOC 8; SB 1729
(5) Leo VI 886-912
Obverse: +LEON bAS-ILEVS ROM, crowned bust facing with short beard, wearing chlamys, holding akakia
Reverse: +LEOh Eh ΘEO bA-SILEVS R-OMEOh, legend in four lines.
Ref: Sear 1729; DOC 8
(6) Leo VI 886 - 912 AD
Obverse: +LEON bAS-ILEVS ROM / crowned bust facing with short beard, wearing chlamys, holding akakia
Reverse: +LEOh Eh ΘEO bA-SILEVS R-OMEOh / legend in four lines
Ref: Sear 1729
(7) Vandals 527
Obverse: Cuirassed bust right with text DIИIƧIΓΛNOVƧ
Reverse: Large M Star both sides, cross above, no officina letter present, mint mark ANTIX
Ref: Sear 213 Prototype?