Rip it open.
Maybe this Guy on Ebay will do the same with his Polar Bear pack:
http://www.ebay.com/itm/POLAR-BEAR-T...kAAOSwd0BVxOIh
Its stated as 1909, but i had a hard time zooming in, to me almost looks like 1911...IDK??
Just trying to get a idea of what you guys are talking about, stuff like this is interesting.