Hi, Gang. I'm guessing at the age range of the radiator overflow hose clip, but think I'm pretty close. I'm sure the never-used GM radiator petcocks are also correct for Buicks for quite a few years before and after the 1968-1972 range. The used radiator overflow hose clip was both clipped and spot-soldered to the radiator that was in my 1971 GS. The solder still shows on the back of the clip. The letters "AD" are embossed on it. And, as I mentioned, the two GM radiator petcocks have never been used. The price for all three pieces is $31, plus $6 shipping in the U.S. Thanks for looking. John