CLOG - Acorns - Available in 3 sizes, slung and wired (Showing the small and Large size). - c.late 1970 / 1971 - The Medium size Acorn slung was made by Stephane Pennequin and donated to the Karabin Museum.
CLOG - Acorns - Mountain magazine review, September 1971
Classified ad shown in Mountain magazine 1970. Listing two sizes of Acorns but these are made by Troll, not CLOG.
Nevisports catalog early 1970s, showing three sizes of Acorns Wiresling nuts. CLOG was using the word "Wiresling" around late 1971 / 1972.
Acorn nuts are not shown in the 1972 CLOG catalog. The Acorn nuts may have only been made available for 1970 and 1971.