Thanks guys, I actually got it sorted. The big magnifying glass revealed that they are indeed tiny little hex-head bolts. I don't think even a set of precision nut drivers would have one that would fit. I used a set of forceps to clamp on the head at the flats and after a couple of slips, they unscrewed easily without scratching the faceplate. Once out the faceplate lifted off, but there's a flat piece of metal under it that the lens and the front view glasses are mounted on. The bulb lever is attached to backside of the plate. In order to remove it, I had to gently bend the bulb lever so it could be pulled through the slot in the camera frame. I believe that's how it was assembled originally, since the lens and viewing glasses are held on with bent metal tabs from the back. There's no other way to access them. Once that was accomplished I had free access to everything. The shutter works perfectly, but this has got to be the dirtiest, skankiest camera I've found yet. The mirrors had a crust on them, as did the lens and the viewing glasses. Even the lens behind the shutter was crusty. I got it all cleaned up, blew/wiped it all out and glued the mirror back in, its drying right now. I used a cleaner/conditioner on the leatherette and glued a couple of loose corners down with contact cement.
It looks pretty decent. The faceplate cleaned up pretty well. My only concern at this point is getting those little bolts started again. I don't want to clam them in the forceps for fear if any of them pop out, they'd be long gone.
Thanks for the advice! At least they weren't rivets.
