76+77 Body Codes?

[broncojack]

I was looking thru Marti reports and noticed there were 2 similar body codes for 1976 and 1977.
SV = Parchment Knit Vinyl Sport Bucket Seats
RV = Parchment Knitted Vinyl Bucket Seats

Was the Sport the Rosette pattern?

Pictures please..

 

[gnsteam]

My 76 is RV. Its a base model with the special decor package.