From Classic Boat Library
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Dunphy Boat Corp.
322 and 560 Broad St.
Speedway Trailers, Inc. was a division of Dunphy Boat Corp.
History by Andreas Jordahl Rhude
Robert F. Smith of the Chicago area and his brother owned a marine dealership (Smith Marine) in the Berwyn area in the 1960s. They along with their father purchased Dunphy Boat Corp. of Oshkosh, WI in 1963 and quickly drove it into the ground.
About 1970 Smith Marine opened another dealership at Sequoit Harbor near Antioch. He also started Classic Boats, Inc. about that time, manufacturing fiberglass boats. I have no clue how long they lasted. They were at 1 Roselle Road, Roselle, IL 60172 in Chicagoland.
Smith purchased Sea Sprite Boat Co. at Crescent City, IL on Friday the 13th of April 1984. Melvin Redeker, the seller, never got paid in full.
Smith eventually had his fingers in many other boat-building firms which he operated under the umbrella of United Marine Corporation.
Smith filed for chapter XI bankruptcy on 25 April 2002 with $97 million in claims against him and his businesses!
1958 Dunphy Manta Mercury Mark 78EL Test