I think I see what you are referring to but IMO I don't believe that would be considered a die crack. JMO Dave
There is nothing there. If it were a die crack or cracked planchet you would be able to see clearly. Even zoomed in, your pictures show nothing of the sort. Sorry.
I see no die crack - just a stained coin, from circulation. Nothing special about it, unless you'd care to be more specific about what you see, and we can't.
This is one one of those things that is dufficult to tell from a photo. It could be a crack but it's not likely in the way it is laid out as it is not a common location for a die to crack to form. Most likely it is an old scratch. Possibly from a teller opening a box with a blade. Good eye though. Get a decent USB microscope and it will be easier to tell.