no external doors to the dining saloon, the windows retained the droplight and quarter light arrangement. On the other hand, open stock had a two-window arrangement whereby each seating bay had two windows side by side. One window was fixed and the other was a droplight. Restaurant vehicles such as the B2 first class dining car and the B3 third class dining saloon had Stone's pattern ventilators above the fixed windows but this feature was not included in other open stock. The J5 open thirds were unusual in having four doors per side rather than two. The doors had adjacent quarter lights like those on the side corridor stock and opened directly into the passenger saloon rather than the end vestibules which only accommodated the lavatories. The "North Atlantic" stock clearly belonged to Period II but the large picture windows and toplight ventilators had been inspired by contemporary Great Western Railway practice. The full set of five coaches was made up of four types. These were a B4 buffet car, an H3 side corridor tricomposite, two J8 side corridor thirds and a K3 side corridor brake third. The buffet car was long and the others long. The class V14 bogie brake vans that appeared in 1936–37 were superficially similar to the LMS variety. However, they had standard underframes as opposed to ones and beading strips on the sides to cover panel joints. The J10 open thirds that were built at the same time as the V14s generally reflected the styling of William Stanier Period III stock but these too had beading strips. Lavatories on these coaches appear to have been an afterthought. There were three doors on one side but only two on the other; a single lavatory had been squeezed into the vestibule where the missing door would have been. Despite their modern appearance, their bus type seats were not popular with passengers. NCC coaching stock designations * Note that there is no distinction made between corridor and non-corridor stock. Much of the information in this section is derived from a review of NCC coach diagrams. Preserved vehicles A number of NCC vehicles have been preserved. Class U2 4-4-0 No.74 Dunluce Castle'' is on display at the Ulster Folk & Transport Museum, Cultra, County Down. Class WT 2-6-4T steam locomotive No.4 is owned by the Railway Preservation Society of Ireland at Whitehead which operates it on special excursion trains