You have a typical Lefever that follows the "Lefever rule" exactly. Anything goes and if a customer asked the maker to put that type of wood on a gun it would be done. You scratching is very interesting. Another direction of engraving like the Baker style of etched engraving is different. It might look better i fyou darken it slightly to take away that high shine look.
I have a DS 12 with a burl walnut stock that would have looked at home on any high grade double of its day. How did a top selection blank end up on the cheapest grade gun? At first I thought it was a damaged blank but can find no sign of blemish or repair. Then considered an employee gun or a special order gun. Maybe some one did pay double for a DS with a great hunk of wood. If only the records remain so many of these open ended questions could be answered. How many odd Lefevers have we seen? Lefever are just like a box of chocolates and you never know what you will see or find inside or outside.