reCLOCKS: These optional design features are located at the ankles, either on both sides, or just the outside.
Yes, Jackie, i know, (i haven't read your links yet...) but why are they called clocks? -- tsuwm, does the OED have anything?

like wolf, and Mod, i have seen 'clocks' used in literature, and know what they are (years ago, i knew in general, but now i have a must better visual/mental defination.. ) but i most dictionaries are lacking any detail.

Knitting site have info on what clocks are, and patterns but not on the words history or origin.