Back side of the Cane Creek lever = Tektro part number. This is pretty common knowledge, Tektro supplies brakes for a lot of other brand names, including Cannondale at one point. Which, frankly, is to our benefit.

Sometimes the secondary brand keeps around a design for a longer period than Tektro carries it under their own name (e.g. The 200 series levers, which one can still purchase from Cane Creek or Origin8). For years, an online vendor was selling Tektro 539's, which are an excellent dual pivot caliper, for around $20 a pair but branded as Cannondales. We win!