
First Day Cover, Usa, Sep 24 1956
First Day Cover, Usa, Sep 24 1956: Depicting Devils Tower national monument

First Day Cover, Usa, Nov 9 1956
First Day Cover, Usa, Nov 9 1956: Wildlife conservation, depicting king salmon. Four of the same stamps

First Day Cover, Usa, Sep 14 1953
First Day Cover, Usa, Sep 14 1953: Depicting Sagamore Hill, Oyster Bay - the home of Theodore Roosevelt

First Day Cover, Usa, Apr 30 1956
First Day Cover, Usa, Apr 30 1956: Commemorating the fifth International Philatelic Exhibition

First Day Cover, Usa, Sep 11 1952
First Day Cover, Usa, Sep 11 1952: Celebrating Women in the Armed Forces

First Day Cover, Usa, Sep 18 1955
First Day Cover, Usa, Sep 18 1955: Commemorating the Bicentennial of Fort Ticonderoga

First Day Cover, Usa, Sep 6 1952
First Day Cover, Usa, Sep 6 1952: Commemorating the Centennial of Engineering

First Day Cover, Usa, Dec 15 1956
First Day Cover, Usa, Dec 15 1956: Children\'s stamp, witing accross the top says \"friendship - the key to world peace\"

First Day Cover, Usa, Jan 17 1956
First Day Cover, Usa, Jan 17 1956: Commemorating the 250th anniversary of Benjamin Franklin

First Day Cover, Usa, Apr 5 1956
First Day Cover, Usa, Apr 5 1956: Commemorating the centennial of Brooker T. Washington

First Day Cover, Usa, Feb 12 1955
First Day Cover, Usa, Feb 12 1955: Commemorating Michigan State college and Pennsylvania State University, the first of the Land-Grant Colleges.

First Day Cover, Usa, Jun 1956
First Day Cover, Usa, Jun 1956: Wildlife conservation, depicting Pronghorn antelope

First Day Cove, Usa, May 5 1956
First Day Cove, Usa, May 5 1956: Wildlife conservation, depicting the wild turkey

First Day Cover, Usa, Feb 23 1955
First Day Cover, Usa, Feb 23 1955: Depicting the Rotary International organization.

First Day Cover, Usa, Feb 28 1952
First Day Cover, Usa, Feb 28 1952: Commemorating 125 years of Rail Transportation

First Day Cover, Usa, Jan 15 1957
First Day Cover, Usa, Jan 15 1957: a stamp honoring those who helped fight polio

First Day Cover, Usa, Apr 30 1953
First Day Cover, Usa, Apr 30 1953: Commemorating the Louisiana Purchase Sesquicentennial