LOT of 8 New York Central Lines Train Advertising Prints 1920's

My husband has had these prints stored at our home for as long as I can remember. I don't know a lot about them, except for the following. Each print measures approximately 11" x 9 5/8". Each has a date in the right side edge. Each has a caption. The captions are as follows (and should be in the order of the photographs above.

Caption 1: The Twentieth Century Limited / of the New York Central Lines / The Greatest Train in the World (date along side: 1923)

Caption 2: As the Centuries Pass in the Night / The Twentieth Century Limited / of the New York Central Lines (date along side: 1924)

Caption 3: When Winter Comes / The Twentieth Century Limited / of the New York Central Lines (date along side: 1925)

Caption 4: A National Institution / The Twentieth Century Limited / of the New York Central Lines (date along side: 1926)

Caption 5: In the Hudson River Valley / The Twentieth Century Limited / of the New York Central Lines (date along side: 1927)

Caption 6: Westward Bound, / In the Mohawk Valley / The Twentieth Century Limited / of the New York Central Lines (date along side: 1929)

Caption 7: Morning of the Mohawk / Natures Own Highway, the Water Level South / The Twentieth Century Limited / of the New York Central Lines (date along side: 1931)

Caption 8: This is the first of the
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