looks like one of those KMC superlite chains. I just run their normal X10 chains for all my bikes except for the singlespeed, that gets a SRAM 8spd. Their regular chains last a LONG time before having shifting issues and never broke one.

You can carry a sram 10speed power link if you want to keep running the light weight stuff but I'm sure you busted a nut or knee on your stem when it broke