Imperious - what are you talking about?
Seriously, it's not clear to me. What do you think is wood?
The slot is exactly where it should be (approx 1/4" above the grips). That just seals it for me that it is a real Graflex bottom.
I didn't notice any other scratches that definitely looked like metal (besides the big chip). With all the dirt everywhere it's hard to say. I do think hey're metal, just looking for more supporting evidence.
DS- I bought 3 or 4 sets of bolts before I found exact matches. It was so long ago though I don't remember what store finally had them. Others were too long, had recessed circles around the hex hole, or the three stamped letters.