Late Edward IV or Richard III Groat?

[The Coin Realm]

I am currently helping someone to identify this groat. The legend has clipped the name of the king, and by the looks of it, it strongly resembles either a late Edward IV or a Richard III. Tricky to tell.

I've attached the only two photos I currently have. I would really appreciate any help or thoughts.Thank you so much for your time and replies, I really appreciate it. 

Edited September 22 by The Coin Realm

[jelida]

Well the mintmark (above the ‘C’ of CIVITAS ) looks as though it might be a cross pattee, or at least the leg of an expanding cross. This would rule out Richard III,  but it could still be Edward IV, Henry V etc-  though I haven’t looked into further detail.

Jerry

[The Coin Realm]

Ah yes, you may be right, thank you for your insight and reply, much appreciated.