Model 31 "F" grade photo wanted

[300 Savage]

I was wondering if any one can provide a digital photo of the engraving on a Model 31 shotgun? I wanted to compare the engraving with a gun for sale that is reported to be an "F" model. However the engraving does not look factory, but I am going from memory of an "F" model I saw about 5 years ago. Any help would be appreciated.