1957 Buick Roadmaster Convertible Series 70
- Engine
- 364 cu. in. OHV V8, 300 bhp
- Colour
- Carlsbad Black with red

The 1957 Buick Roadmaster convertible is among the rarest and most desirable configurations of that model year, with only 4,364 examples produced. Riding on a 127.5-inch wheelbase and powered by a 364 cu. in. 'nailhead' V-8 producing 300 bhp, it features the longer, lower body introduced for 1957 with distinctive sweepspear trim and radiused rear fenders. This example received a comprehensive frame-off restoration under prior ownership and was subsequently displayed in the Kughn Collection at prominent concours events.
Ownership
- —Auction saleSold US$148,500
- Date unknownPrior owner who commissioned restorationpartial documentation
This owner undertook a thorough frame-off restoration to a high standard, resulting in the excellent condition visible today.
- Date unknownAcquisition unknownKughn Collectionpartial documentation
The car was exhibited at multiple concours events during this owner's tenure, reflecting pride in its quality and presentation.
Competition
- 20112011 Concours d'Elegance of America at St. John's
Car was displayed as an exhibit while in the Kughn Collection.
- 20112011 Bay Harbor Vintage Car & Boat Festival
Shown at this Northern Michigan event in the same year as the St. John's concours appearance.
Maintenance & restoration
- —Restoration
A thorough frame-off, nut-and-bolt restoration was carried out, resulting in well-fitted body panels, a deep Carlsbad Black and red paint finish, a properly detailed engine bay with correct finishes and a Delco battery, a restored and carpeted trunk, and a pristine red leather interior.
Work was completed under prior ownership; recorded mileage of 22,327 is believed to include pre-restoration miles.
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