my parents picked this up at an antique store in central Michigan. They came to visit and brought it with them last week. Just got around to lapping it.
It's interesting looking...I've never seen a BBW in person, and no pictures I've seen really look like this.
The slurry comes easily and smells of iron.
Lapped at 600 grit, it's slightly less smooth than my thuringian.
I'm not sure you can completely tell from the pictures, but it's not homogeneous, nor is it striated.
Pictures are uploaded to imgur.
Photo Album - Imgur