Error coin

In 1994, fewer than 150 copies of the half dollar were accidentally cut with a scalloped edge instead of the normal reeded one. This is Sealand's only error coin to date.^[3] In addition, a mule of a Navy SEALs commemorative medallion was inadvertently struck, by the same private mint that produces Sealand's coins, using the reverse of a Sealandic half dollar. 75 of these were struck before the error was noticed.^[4]

Rebel government coin

A rebel government, referring to itself as the "Sealand government in exile", seeking to occupy Sealand, issued a single commemorative coin in 1992.^{[citation needed]}

1969: Explorers

• Vasco da Gama 1497 – 2c (later 10c)
• Christopher Columbus 1492 – 3c (later 10c)
• Sir Walter Raleigh 1584 – 5c (later 5c)
• Sir Francis Drake 1588 – 6c (later 10c)
• Captain James Cook 1770 – 14c (later 10c)
• Ferdinand Magellan 1519 – 20c (later 20c)
• Sir Martin Frobisher 1578 – 50c (later 10c)

1970

• Ship – SX$1
• Ships – SX$1
• Edward Teach – SX$1
• Squid – SX$1

1970: Ships

• Ships

1970: Fish

• Fish

1975: International Woman's Year

• Africa – 10c
• Australia – 20c
• Europe – 30c
• Asia – 50c
• America – 90c
• Joan I – SX$1

1977: Sailing ships

• Ship of Ferdinand Magellan 1519 – 10c
• Ship of Vasco da Gama 1497 – 20c
• Ship of Christopher Columbus 1492 – 30c
• Ship of Captain James Cook 1770 – 40c
• Ship of Sir Walter Raleigh 1584 – 50c
• Ship of Sir Martin Frobisher 1578 – 60c
• Ship of Sir Francis Drake 1588 – 70c
• Sealandic Coat of Arms – 80c
• Roy of Sealand – 90c
• Joan of Sealand – SX$1

2010

• Green stamp SX$3.50
• Red stamp SX$1.50
• Blue stamp "Inland"^[5]

2023

• The Fort SX$3.50^[6]
• The Independence Day Flag SX$3.50
• The RIB SX$1.50
• Sealand Flag Prints SX$1.50
• Inland Seal "Inland"
• Inland Crab "Inland"
• Inland Seashell "Inland"