There are no dragons that take 39 hrs to breed, even expired ones.
The only thing I can think of is the Diamond Dragon, which takes 44 hrs. Did you record what time it took immediately after you saw it? Because if you waited a few hours, then there's no way of telling what it will be until you see the egg.
Well, no luck getting metal this weekend but I did get Night, Leo, and Justice. I'm happy with those. I all but gave up on getting a third Diamond. I got the first 3 within a few days of each other then nothing. Oh well, I guess I'll get them eventually.
The page you created has been deleted as it is not main page appropriate. You are more than welcome to create it as a Blog which is the normal method of adding this type of information to the wiki. I copied the information down (in case you don't have a copy) before deleting that page. Let me know if you need it pasted to your wall so you can create a Blog.