When it was erected in 1963, this white-brick cooperative apartment house was on the fringes of the Upper East Side in a light-industrial area north of the attractive institutional corridor along York Avenue. Its main attraction, and not an insignificant one, was that it was at the end of a quiet, dead-end street overlooking the East River. Its main liability, however, was that it was very far east on the Upper East Side and far removed from the subways. In time, however, things changed, dramatically, soon after Sotheby's, the auction house, relocated to the west end of the block at York Avenue. Three major new luxury high-rise apartment towers soon followed and the area now is an impressive residential enclave. The east end of the block, at the building's entrance, ends in a very attractively paved, curved seating area overlooking the river and Roosevelt Island. The building's canopy is a bit unusual in that it is has a sharp angle in it to conform to the curved sidewalk. This 21-story building has 128 good-sized apartments, many with large picture windows and some with balconies, many now enclosed, and some with terraces.