Constantine Type, not sure when or who

Please I’d this one for me

 

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It's a city commemorative like these, but I can't make out the mint on your coin:

CONSTANTINOPOLIS COMMEMMORATIVE
AE3/4
OBVERSE: CONSTANTINOPOLI, laureate, helmeted & mantled bust left holding scepter
REVERSE: Victory standing left, foot on prow with sceptre and leaning on shield, CONS Gamma in ex.
Struck at Constantinople, 330-33AD
2.2g, 15mm
RIC VII 63

CONSTANTINOPOLIS COMMEMMORATIVE
AE3/4
OBVERSE: CONSTAN TINOPOLIS, laureate, helmeted & mantled bust left holding sceptre
REVERSE: Victory standing left on foot of prow with sceptre and leaning on shield, •BSIS• in ex.
Struck at Siscia , 334-335 AD
2.39g, 17mm
RIC 241

CONSTANTINOPOLIS COMMEMMORATIVE
AE3/4
OBVERSE: CONSTANTINOPOLIS, crested, laureate helmeted bust of Constantinopolis left in imperial mantle & holding sceptre
REVERSE: Victory with open wings standing left, right foot on a vessel's prow holding sceptre & leaning on shield. Mintmark SMTSD
Struck at Thessalonica , 330-33 AD
2.3g 18mm
RIC VII 188

 

Bing, thanks for helping me.

 

The mintmark is unclear, but it is not from the four mints around the Bosporus (Heraclea, Constantinople, Nikomedia, Cyzicus) which used the spelling CONSTANTINOPOLI, omitting the terminal "S" found elsewhere and which is on your coin.

Here is a CONSTANTINOPOLI coin from Heraclea: