Tiffany 1980 engagement ring

[latituded]

Need your help from the Tiffany experts!

Found a ring for sale and on the Tiffany certificate dated in 1980 says "extra extra river" color. Can any one tell me what it means in GIA term (e.g D,E,F,G,H,I, etc).

Thank you so much!

 

[y2kitty]

Its equivalent to D or E

 

[jewelerman]

In the days before the use of GIA color scale the use of the word river denoted E-F color...so im thinking that extra,extra river would be a very high graded E because the term Jager would be the term in this older grading system for D color.