1951 American Chemical Society #1002

This is a First Day of Issue envelope commemorating the 75th anniversary of the American Chemical Society (ACS), featuring a U.S. postage stamp issued in 1951. The envelope is a collectible item for philatelists and those interested in the history of science, celebrating the ACS's contributions to chemistry and scientific advancement since its founding in 1876. **Product Description:** - **Title:** 75th Anniversary of the American Chemical Society First Day of Issue Envelope- **Issue Date:** September 4, 1951- **Location of Issue:** New York, New York (postmarked with the date and time: 9:00 AM, Sep 4, 1951)- **Stamp Included:**   - A single 3-cent U.S. postage stamp titled "American Chemical Society Diamond Jubilee 1876-1951."  - The stamp features a design with a diamond shape in the center, symbolizing the "Diamond Jubilee," along with chemical apparatus (a flask and a burner) and the ACS logo. The stamp is in a reddish-brown color, with the text "United States Postage 3¢" printed o