My first "10-speed" was a gas pipe Chiorda (around 1970) that came with Simplex (I was upset it *wasn't* Valentino!), but the levers were the alloy Criterium levers with black plastic covers. The AO-8 that replaced the Chiorda was also simplex equipped and came with all alloy levers. The first time I rode a bike with the "normal" plastic simplex levers I wondered what was wrong with the shifting, they flexed so much!