Well, these arrived today!! I'm quite pleased, one or two should be a challenge, but the others should clean up right dandy! Got lucky with six!! Attribution will be a challenge with the missing
mint marks, but I'll give it my best shot. I guess I'm officially entered into the contest, but I just don't know if I'm in Round 11 or Round 12?
Well, into the swill they go!!

Rick
BEFORE
AFTER

These all cleaned up quite a
bit more than is showing in the scans, but at least the green ones are still green......

Top row, left to right:
Constantius IIMintmark: gamma S ?
Mint:
SisciaYear: 355-361 AD
Bust: pearl-diadem, draped,
cuirassedObv: DN CONSTAN-TIVS PF
AVGRev:
SPES REI-PVBLICE
Emperor helmeted, in
military dress standing left holding globe and spear
17mm
Septimius SeverusNikopolis ad Istrum,
Moesia Inferior
Year: 193 - 211 AD
Bust: laureate head right
Obv: AY K Λ CEVHPOC
Rev: ΝΙΚΟΠΟΛΙΤΩΝ ΠΡOC ICT
Snake entwined around tripod
16mm
Either
Honorius or
Theodosius IIMintmark: ?
Mint: ?
Year: 408-423 AD
Bust: pearl-diadem, draped,
cuirassedObv: ?
Rev: GLORI-A ROMA-NORVM
Two emperors standing facing, heads turned to one another, supporting a globe between them
15mm
Bottom row, left to right:
Constantius IIMintmark: ?
Mint:
NicomediaYear: 355-361 AD
Obv: DN CONSTAN-TIVS PF
AVGRev:
FEL TEMP RE-PARATIO
Fallen horseman, reaching, Phrygian helmet, bearded, dot S dot in left
field19mm
RIC Nicomedia 91,92
ValensMintmark: ? SI ?
Mint:
SisciaYear: 364-367 AD
Obv: DN VALEN-S PF
AVGRev: SECVRITAS-REIPVBLICAE
Victory advancing left
18mm
RIC Siscia 7b
Constantius IIMintmark: ?
Mint: ?
Year: 355-363 AD
Obv: DN CONSTAN-TIVS PF
AVGRev:
SPES REI-PVBLICE
Emperor helmeted, in
military dress standing left holding globe and spear
17mm
You'll have to cut me some slack on the attributions..... I'm still new at this.

Regards,
Rick