What is the golden era of Colt?

What years would you define as the "golden era" of Colt and why? What I mean is what period of time in Colt's history do you think they excelled the MOST at quality control, level of finish quality, types of models offered, or any other characteristic which you deem relevant to determing such a thing?

I forget how to post a poll, but I would rather just have peoples commentary anyway... Thanks.