I'm only asking as some chains, (defo 10 speed), must never be re-connected by using the same pin that was removed. This was how I discovered the info
I re-connected my chain with the old pin, and very quickly noticed a clicking type of noise. Turned out to be the chain plate hitting the front mech as it had worked loose, and it looked very much like the link in your picture.
Chains are bit like car timing belts IME. If you can't quantify it's history, for instance when you buy second hand, just stick a new chain on for peace of mind. Mind you then you might discover you need new rings and a cassette too
What ever your chain is I'd recommend you replace it with a KMC X chain. Don't buy a Shimano chain, they're crap.