>>1916298Rock Island, MKT, Rio Grande and UP are my mainstays, but I have an SP cup and saucer and a pair of New Haven plates along with 3 NY Central plates. In my opinion I think the prettiest was probably the service plate used on Pennsy's 1938 Broadway Limited followed by the grey Mercury pattern used on New York Central's Mercury and then the Rock Island's green sage pattern. The hardest to find or expensive I've seen are the Milwaukee Road's Hiawatha pattern along with ATSF's Turquoise room and anything from a line that went out of business before the 1920s like Colorado Midland or some of the old patterns of any road pre 1920. Also, some business cars were equipped with exclusive patterns, like Rock Island had a business car service plate that complimented their sage green pattern that has big red heart in the center with a gold leaf "RI" monogrammed on it.