Originally Posted by
Salamandrine
I'm not familiar with that particular chain, but if it's of similar vintage as the bike - well, there were no quick links then. Only thing like quick links was the master link on BMX bikes and other one speeds that used an 1/8" chain. Chains were taken on and off all the time using the normal link. That was the only way to do it...
Quick Link is actually a Shimano trademark and they had a tool free master link for 3/32" derailleur chain in the very late 1970s called the Link Lock. It was very similar to KMC's Missing Link with the exception that it employed a single locking pin which was not captive. Tool free master links were rarely used in factory settings. So, while I would not expect to see one on a 1987 model with OEM chain, they were available.