PP, this is the favour returned, I had this queuing up in a snipe attempt! The diameter of the Constans Victoriae coin and weight are close enough to be ok, but 19mm is a little large ......they are usually 15mm'ish. The URBS/Constantinople barbarous is very nice, but it should be 16mm, Its a typo I think. Its a nice barbaric with the mixed up obverse/reverse types, but you may have to bid high as the guy who buys all my barbs (moi1584 - a lovely chap, who knows his barbs) is ruthless when he wants one and he WILL have spotted it!
Anyhow, I'll back off on this one.....good luck.