New York Central bay window caboose 21630 brings up the rear of Flexi-Van hotshot SV-4 at Worcester, MA on 4/30/67. NYC 21630 was from Lot 827, built by St. Louis Car Co. in 1952 and rebuilt and renumbered from series NYC 20298-20497 during 1963-65. Tangent has just completed a second run of this car in HO scale, with a revised shade of Century Green.
SV-4 was the Selkirk-Boston section and carried trailers in addition to Flexi-Van containers. While NYC was widely known for its innovative container system, it began TOFC service in 1962 and joined Trailer Train in 1964 with TOFC spreading across the system. Clearance issues close to the city prevented piggyback service into Boston until 1966. Scanned from the original Tom Murray Kodachrome slide, my collection.
CENTRAL ARTERY 
Another fine post!! I’ve been catching up with your past posts and enjoy the wealth of prototypical and modeling information you include. Mentioning the NYC joining Trailer Train is another great tidbit that I don’t think many modelers realize because of their more famous Flexi Van trains.
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