Vintage pair Dutch long grey cotton socks initials CM size M

Vintage pair Dutch long grey cotton socks initials CM size M. 100% Cotton. Dyed grey. Ribbed section at top, large initials at top of each - looks like CM but can't be absolutely sure. Size: length: 17.5 inches (top to heel); length of foot: 10.5 inches. Weight: allow up to 1 kg once packed. Good vintage condition.