The Lionel 1993 Soo Line Special was a popular O/027 gauge train set, often sold as the “Service Station Special” (SSS), featuring a GP-38-2 diesel locomotive (like #6-18825) and various freight cars, including a distinctive Soo Line REA Reefer (#6-19536) with opening doors, known for its colorful design and die-cast trucks, running on AC/DC power in Lionel’s 1993 catalog.