H. Losee, [Construction on 6th Avenue at 30th Street- Sixth Avenue Line (IND)], 1939, R101S8_z002, Subway Construction Photograph Collection. New York Transit Museum. Holiday Train Show Timelapse https://www.nytransitmuseum.org/wp-content/uploads/2018/10/Holiday-Train-Twitter-converted-with-Clipchamp.mp4
