So a Fine is three things, a two year old Calvados. A brandy, but not a clear eau de vie, from another region such as Maine or Burgundy made with either grapes or apples that has been aged probably for 2 years or more in line with the Calvados description and uses the Fine designation as apart of the AOC official name. Lastly Cognacs made from a mixture of Grande and Petite Champagne eaux de vie (with at least 50% Grande Champagne) may be marketed as "Fine Champagne" Grande and Petite Champagne are different areas of Cognac.
Thanks! That is very useful to know!