Do any of you have access to photos or catalogue pages for the graded Baker guns?

I have a graded gun that by description appears to be a "S" from the engraving but there is a "R" on the barrel flats following the serial number. It was sold as a "R".

I am also curious about the "H" stamped on the barrel hook. I can find reference to it's exsistance but no meaning is attached to it.

I am also interested in the woodcock that always seems to be part of the Baker engraving.

al