I like it. Certainly looks like a work pipe. But a nice work pipe. Even with the number of clearly present fills the grain is still nice enough to shrug those off. Also like the stain.
I smell the Wally Frank catalog.
I only have a very few pipes with extremely dark stained briar that color.
Old French briar was advertised by WDC for years as superior.
Baron is a grade, most likely, like Golden Duke or Crown Duke. There might have been a Sovereign, Prince, or Royal.
There was an American pipe maker with the initials K.F.S. who was ashamed of his foreign (German?) sounding name.
So he had a stamp made up
OLD FRENCH BRIAR
MADE BY K.F.S. (Karl Fredrick Siegfried ?)
He had cursive stamps for second grades with fills, such as Baron.
Maybe someone else has a K.F.S. who can help solve the mystery?
That was intended to be a top shelf pipe, but needed fills. Note the web between bowl and shank. Hand turned?