Indian wotsit -Keratch?

[kronckew]

Originally Posted by Rick

Those blank spots on the blade are curious.
Usually I see this pooled, or bullseye pattern used in contemporary work, but this isn't contemporary I think.

I suspect the 'blank spots' aren't, it's just artifacts from my converting to greyscale to emphasize the patterning and 'optimizing' the photo to HDR. I'll take better ones eventually when it arrives.