Now that I am on a browser that shows the pics, the two center looks great. The large lettering might make it more common but prob not the die crack. I shall have to check if that really is the case. I've just tried vinegar lately on some finds and it's not harming the patina but the large black areas on copper or bronze/brass items seems to come up really well. And it takes like 40 min checking at 10 min intervals and using toothbrush and water.