1973
The Riviera was restyled for 1973. So was the last Boattail-year.
"The Riviera was restyled for 1973"
- Boattail site
Information about the Buick Riviera.
The Buick Riviera is a personal luxury car produced by Buick from 1963 to 1999. GM's first entry into that prestige niche, the Riviera was highly praised by automotive journalists upon its high-profile debut. While early models stayed close to the original form, subsequent generations varied substantially over the Riviera's thirty-year lifespan. In all, 1,127,261 were produced.