Saw a trim tag on a GS350 last night which said R 26 B beside PNT. I later realized I didn't even note what year the car was, but either 70,71,72 What's the R stand for ?
Must have been a 70 car because code 26 is stratomist blue which was a special Riviera color in 70. Stratomist blue became available on all Buick models in 71 and 72. R = Riviera.