Need a little help IDing my coin

Hello, I'm new to the forum. I have been researching coins for a few years. I have had this one coin that I can't figure out. I would be very appreciative if you would help me ID it. My grandfather who also researches coins thinks it might be Greek. I think it could be Greek or Roman. I have seen several Roman coins with the horses on the reverse side as well as Greek.







Thanks for your time!

Megan

[ethnucoins]

It's a posthumous coin of Constantine I (Roman Emperor) - have a look here (search for quadriga to see similar coins):

http://www.wildwinds.com/coins/ric/constantine/t.html

I think it's from Constantinople - the mintmark in the exergue on the reverse has an O in it anyway - so it might be "Constantinople RIC VIII 37" or similar (see on the Wildwinds page).

Exactly which coin it is depends on the mint it's from.

ATB,
Aidan.

These are not broadstrikes. Broadstrikes go the whole circumference. It is an Offset Misalignment Strike, most not quite enough to have collector value. Refer to Alan Herberts Official Price Guide to Mint Errors for more info.
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