CanadianBuckeye
Songster
I don't think they are ISA's; no golden chipmunk markings. But, if they are, then like you said, I will have some good egg production. Although, I do have black sex links and they are beasts when it comes to egg production. With my luck and chickens, likely they will be lack-luster birds.
Sometimes serendipity works in your favour and these will be the best egg layers ever!