Scott #C58 1960 US-Japan Treaty Airmail and 50 similar items

This philatelic offering is a captivating First Day Cover (FDC) commemorating the 7c U.S.-Japan Treaty Airmail stamp, Scott #C58. Issued on August 18, 1960, this FDC originates from Portland, Oregon, the official First Day City. The stamp itself features the distinctive USI logo alongside an airplane, signifying its importance as an international airmail issue. The cover's unique cachet is formed by the striking red and blue diagonal stripe border characteristic of official U.S. Air Mail envelopes, serving as a visual testament to its airmail purpose. The First Day of Issue is confirmed by two distinct postmarks: a clear circular date stamp from "PORTLAND AUG 18 9-AM 1960 OREG." and a prominent machine cancel stating "FIRST DAY OF ISSUE" accompanied by wavy lines. This FDC is addressed to Joseph Simek of Gates Mills, O., adding a touch of personal history to this collectible piece of philately. Event: First Day of Issue Scott #: C58 Stamp Subject: U.S.-Japan Treaty Airmail Date of Issue: August 18, 1960 First Day City: Portland, Oregon Cachet Maker: Not credited Cachet Description: Standard U.S. Air Mail envelope with red and blue diagonal stripe border. Postmarks: Circular Date Stamp "PORTLAND AUG 18 9-AM 1960 OREG."; Machine cancel "FIRST DAY OF ISSUE" with wavy lines. Addressee: Joseph Simek, Upper Forty Dr., Gates Mills, O.