Italian, 16th C http://www.mfa.org/collections/object/garter-one-of-a-pair-121955
I think the Italian garter's colour combination is rather startling yet interesting since the colours highlight diagonal lines and so suggest the interlacing method of construction. Double twist interlinking would also give diagonal lines but the row height would be higher. Not that I can tell from an online image. The garter is long and skinny and fringed at both ends suggesting a circular warp. I wonder what sort of språng loom was used.
ETA: see reader comment for information about construction of garter