Those are horrible pictures, but I can see enough to tell that the gun has been refinished in a modern tank blue. There is no collector value.
Yeah I haven't been able to figure out a way to take a better picture. If I use the flash or have a light pointed at the gun it glares really bad like in the pictures and if I don't its too dark to make out anything more than the shape of the gun. I believe its just the cheap camera I'm using.
I don't know a lot about gun finishes so what exactly is tank blue? It just seems odd to me to have blue in the name of a color that is a very dark shiny black.