Oh my goodness! That you know that, is.... really quite remarkable!
I love the show, Comic Book Men, especially when the folks bring in something like that; a collectable, or a comic, and an expert can look for just a second and deconstruct the entire history of the object and give a valid estimate of it's value. It may be a useless skill compared to, say, astronomy, or Quantum Physics, but it is much more interesting to me, most times!
Although, I do study Astronomy and Quantum Physics, there are times I just wanna read some Batman comics, know what I am sayin'?
Ah, for fun....