To my knowledge, the original 2.55 always had the turnlock, but with the leather/ metal woven chains. Later upon release of the reissue, Karl revived the flap with the turnlock but the chains were replaced with the bisioux. The classic flap, of course, always had the CC, the original & 2.55 reissue never has.Reissues are amazing. I wish they still made the CC version on that bag. The CC actually looks better in my opinion, although I still love the reissue. For me the closure isn’t as easy on the reissue as a CC turn lock. And the hardware closure fades much more because of the larger size. It is incredibly well made and so carefree and classy.