The USPS introduced the Love series in 1973. The Love stamps are usually issued in time for Valentine mailing and feature designs filled with "hearts
Dedication of World's Columbian Exposition — Mystic Stamp
1993 29c American Sign Language Sign language, Sign language
Weddings Mystic Stamp Discovery Center
U.S.%20%233658%2060%26cent%3B%20Love%20Love%20Series%20%20%20Issue%20Date%3A%20August%2016%2C%202002%20City%3A%20Atlantic%20City%2C%20NJ%20Quantity%3A
3658 - 2002 60c Love Series: Multicolor Love
Liberty Series — Mystic Stamp Discovery Center
U.S.%20%2328131994%2029%26cent%3B%20Love%20SunriseLove%20Series%26nbsp%3B%0A%0AThe%20first%20self-adhesive%20Love%20stamp%0AThe%2013th%20US%20Love%20s
2813 - 1994 29c Love Series: Heart Sunrise
Love Is Stamp Set – The Greetery
Love Series Mystic Stamp Discovery Center
U.S.%20%2321431985%2022%26cent%3B%20Stripes%20Love%20Love%20Series%0A%0AFourth%20US%20Love%20stamp%0AFirst%20Love%20stamp%20issued%20after%20Valentine
2143 - 1985 22c Love Series: Love Crayon
Allies Win the Battle of the Bulge — Mystic Stamp Discovery Center
Return of Official Mail Stamps