Masterworks of Modern American Architecture, Guggenheim Museum #3910

The cachet features a grayscale illustration of iconic American architectural landmarks including the John Hancock Center (Chicago), the Chrysler Building (New York), and what appears to be Eero Saarinen's TWA Flight Center terminal, with birds in flight and a cityscape background. Red text reads 'Official First Day of Issue' and 'Masterworks of Modern American Architecture' with the Artcraft logo. The stamp depicts the spiral interior rotunda of the Guggenheim Museum (1959) in New York, denominated 37 cents, with green and purple text. The postmark is a machine cancel dated May 19, 2005, from Las Vegas, NV 89119.

This First Day Cover features a black-and-white cachet showcasing four iconic modern American architectural landmarks: the Guggenheim Museum, Chrysler Building, John Hancock Center, and TWA Flight Center terminal. The stamp depicts the spiral rotunda of the Guggenheim Museum with a face value of 37 cents. The cover is machine-postmarked with a legible date and location. The text 'Masterworks of Modern American Architecture' is prominently displayed on the cachet, with 'Official First Day of Issue' in red at the top.