I do extensive research on the Indy gear with movies and online finding vintage pieces to see how they are constructed, etc. There are some really good photos of the Crystal Skull holster out of the comprehensive behind the scenes book. Also, I have a Webley WG here in my possession that I am molding to make resin replicas. I have used the WG to make a Crystal Skulls holster. There is only one hole in the flap strap of the Webley holster and the color is a dark brown. Here is my take on the CS holster with the WG in it: