As mentioned in the rescued from the dumpster thread, I found a 1973 Mercier placed in the scrap metal dumpster at Streel Level Cycles Workshop in Berkeley. Initially I thought it was tossed in the dumpster because it was missing one of the shift lever bosses. Later I spoke to a knowledgable friend who mentioned that bike was intended to be with only one Shift lever boss as the other Lever was clamp on. He further mentioned that the simplex clamp on for that bike went neatly around the boss to secure it in an attractive manner. I went back to the Workshop and dug through the bin of odd spare part down tube shift levers sure enough when i opened the bin the first Simplex Shift levers i put my hand on was the unique Simplex Clamp on Lever that I needed. No doubt it was stripped from my rescued Mercier. Bought it back for 5 dollars.