Well I'm getting along at a reasonable pace. Or I was. You tend to hit a slow spot when faced with this:
I've done, I suppose, about a fifth of them so far, but I don't want to talk about that - after all, it only means I have four fifths still to do... However, a few bits of interest as I go along, which helps. Possibly the most curious is this one:
Big deal, you say. It's a centre bit. So jolly well what? S Smith & Sons of Sheffield doesn't sound terribly exciting either. Ah, but turn it over and suddenly it's a positively alive with activity. A roundhead screw on the head, a protruding pin on the shank, and a threaded hole.
Into which fits a knurled bolt that holds this depth stop.
See? And yes, where it appears that the bolt is bent at the end where it exits the shank? That's because it's bent at the end where it exits the shank.
A sharp, used, apparently ordinary 1" centre bit with an interesting role. I wonder what it was? I haven't really made any headway in seeing if I can find out yet, because honestly, I'm not sure where to start. Kinda cool though, eh?
I'd suggest there might be a twist in the tale, but I haven't even started on the augers yet...