Mine is just a whisker shy of 6/8, and the scales feel like wood. The spacer is kind of odd - I think it could be lead (some kind of metal I can scratch with my fingernail, anyway).
I got it from Blackstangal (you da man, Al!) for a song when I asked if he had something on the heavy side for me to try. This is certainly that - it feels a good three times heavier than my full-hollow Imperial.
As has been mentioned, it is a little harder to put an edge on it (my first wedge, though, so take that for what it's worth), and the lack of jimps can make it slippery, but the sledgehammer heft and the edge this thing takes more than make up for any such minor hassles. I could just about shave dry with this beast. It's by far my favorite razor, and it's the only blade I've found - straight or DE - that consistently allows me to shave against the grain without irritation. I checked y'day, and I was still BBS on my cheeks 8 HOURS after I'd shaved.