Yoke for 25 Ton Rear Supporting Jacks, undated Bookmark Collection Context University of Connecticut -Archives and Special Collections at the Thomas J. Dodd Center New Haven Railroad Historical and Technical Association Collection, undated, 1860-1986Series V: Operations, undated, 1865-1975Subseries 3: Drafting, undated, 1951-1962Locomotive blueprints/diagrams, drafting work, date sketches, standard sketches, undatedDrawings 21411-26075, undated