It's hard to make a match from a few images. You might check on coppercoins and see on other examples of the same doubling markers that may match. 001 has some distinctive markers that ID it. You might check to see what other options are available. You could have an example of a later die state of a listed one, or a new variety. So do the checking for matching know markers and if that doesn't work you might post it with images on coppercoins. Sometimes doubling can be too minor and don't get listed. You just have to see where the ride ends. A lot of factors can make a break a dies identity. Its a keeper, just don't loose it for now.