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According to Wlikipedia, the following passenger routes were undertaken by Seaboard
Seaboard Florida Limited, inaugurated 1903
Heavyweight, winter-season only (December - April), all-Pullman, New York to Tampa; later renamed the New York-Florida Limited; by 1941 renamed the Palmland. Reduced to New York - Columbia, S.C., in May 1968; discontinued April 30, 1971.
Southern States Special, inaugurated early 20th century
Heavyweight, coach and Pullman cars, New York to Florida; renamed the Sun Queen by 1941, renamed the Camellia on May 18, 1947; renamed Sunland in December, 1948.
Orange Blossom Special, November 21, 1925 - April 26, 1953; due to wartime restrictions, did not run in the years 1942 - 1945.
Heavyweight, winter-season only, all-Pullman, New York to Tampa/St. Petersburg, and West Palm Beach, later to Miami as well. The most luxurious SAL train of its time, the OBS was immortalized in an extremely famous fiddle tune of the same name.
The following trains constituted Seaboard's widely advertised, very popular "Silver Fleet" of streamliners, with fluted-side stainless steel cars pulled by colorful EMD diesel locomotives:
Silver Meteor, inaugurated February 2, 1939
Initially an all-coach train (Pullman sleepers added in 1941), first streamliner to serve Florida, New York to Tampa/St. Petersburg and Miami. Preserving its reputation as "one of the finest trains in the country," the Meteor retained its round-ended observation cars until Amtrak took over operation in 1971. Still in Amtrak service today with updated equipment.
Silver Comet, May 18, 1947 - June 1969
Streamliner, coach and Pullman cars, New York to Atlanta and Birmingham.
Silver Star, inaugurated December 12, 1947
Streamliner, coach and Pullman cars, New York to Tampa/St. Petersburg and Miami. Still in Amtrak service, with updated equipment.
Gulf Wind, July 31, 1949 - April 30, 1971
Streamliner, coach and Pullman cars, Jacksonville to New Orleans. Handled jointly by SAL and the L&N, with motive power changed at Chattahoochee