DISCLAIMER: I don't own this lock, or have permission to pick it. I don't plan to, I'm just curious about how it works because learning.
I don't actually have a picture, but it looks like a tubular lock, except instead of the pins arranged radially they're internal, and the keyway is comprised of small metal circles with half cut out, not unlike the American Locks bypass prevention wafer. There's a bunch of these disks in a line, and they all rotate freely, I took a straw and aligned them all up to shine a flashlight down in it, but couldn't see anything else.
Again, I'm just curious about this lock, I have no intention of attempting to pick it.