I've seen a lot of articles online that discuss 4 grades of SW200 though? like this: https://calibercorner.com/sellita-caliber-sw200/ or https://calibercorner.com/sellita-grades/ but, I went to Sellita.ch and saw a doc that showed only Elabore, Top, and Chronometer, so you might be onto somethingSW200 only comes in Elabore, Top, or Chronometer. If it doesn't say Chronometer, it's not Chronometer grade. They don't have the Glucydur balance of a Top grade (flared spokes = glucydur). Process of elimination leaves us at Elabore.