Seesaw is a musical comedy based on William Gibson's play, Two for the Seesaw which ran on Broadway in the late 1950s. The music was written by Cy Coleman, lyrics by Dorothy Fields, and book by Michael Bennett. The Broadway production ran in both the Uris Theatre and Mark Hellinger Theatre during its 1973 run.
The show's story explored the romantic entanglements of its key cast but did so in such a way as to also explore the city of New York through song and in this way it is akin to the concept musicals of Stephen Sondheim and Harold Prince.
The most notable feature of the score is its wide use of brass intruments
Original Broadway Production
Seesaw opened on March 18, 1973 at the Uris Theatre and closed December 8, 1973 at the Mark Hellinger Theatre
The Internet Broadway Database's entry on "Seesaw"