Brad -- Coincidentally, there is a Libertas for sale on ebay at this time. Clearly nothing to what you are describing for your own bike as seller reports all Shimano; and unfortunately without a close up view available. Yours' sounds to be notches above. Other Belgian components to look for - handlebars and stems - were made by Superia and (I think) Titan in the 70s. -- JB Froke, Pebble Beach, CA