Socks with Clocks (clox)

Here are a few images of socks with clocks from Knitting Vintage Socks by Nancy Bush:

In the images above and below, the clocks (clox) are the decorative black stitches. Here is the original sock from which Nancy adapted her current pattern:

Here is the explanation of the decorative knit/embroidery from the same book (you will likely have to click on the image twice to read the print—click once to make this image a bit bigger, then click once on that image to make it even bigger):

Here is a modern sock and the explanation of clocks from Nancy Bush's Folk Socks: