I would need better pics of the side with the king's portrait. It looks like it could be Edward IV but I can't be sure. This coin has been heavily clipped. Criminals would shave metal off the edges of the coin and spend the coin, keeping the shavings. This was punishable by death if caught. By the mid to late 1600s it was such a huge problem that hammered coinage was abolished (and traded by weight, not denomination), and the Royal Mint had to start striking milled coins with reeded edges to stop the practice. Unfortunately, because of the clipping, the letters that used to be on this coin are very hard, if not impossible, to read now.
I agree with Edward IV. The lettering on the reverse as well as the style of long cross along with the king's bust on the obverse would point towards him. That said, it's really hard to tell due to the clipping, damage, and photos.
