Undated Codorniu?

[Kim93951]

About 7 years ago I received a bottle of (Cava) Codorniu Blanc de Blanc, 25.4 ozs. It came in a box with two champagne glasses with gold rims, writing "codorniu" and an emblem. On the outside of the box it says, "Imported by: Joseph Victori Wines, Inc., Brooklyn, NY." The bottle says, "Fermented in this bottle BRUT product of Spain." -- San Sadurni De Noya, Spain. The bottle is a very odd tall shape and extremely heavy dark green glass. The bottom caves in and has outprinted markings of 75cl, 00, MR. Behind the top label is 731081. I have wanted to open it soooo many times, but have no info on it. I was told it was very old. If anyone can give me some info, I would be very grateful! Thanks!