Maps, meridians and a large G give the Greenwich Mean Time 10p a design worth a closer look. For someone interested in science, navigation or the story of Greenwich, it offers more than another letter for the album.
Why Greenwich became a reference point
The Royal Observatory is the home of Greenwich Mean Time. As Britain's railway network grew, a shared time made timetables less confusing. GMT became Britain's legal standard time in 1880.
In 1884, the Greenwich Meridian was recommended as the world's prime meridian. The coin's map and grid lines bring that story of time and location into the alphabet.
Two dates, one Greenwich design
G was issued in 2018 and 2019, with the date on the portrait side. Circulation mintages were 220,000 and 84,000 respectively, excluding collector editions. Choose the year that matches your album, or collect both.
A pair for a science enthusiast
W for World Wide Web makes a good companion to G: two different British contributions to the way people connect. P for Post Box adds a more familiar communication design if you want a third coin.
Bring Greenwich into your collection
Find the 2018 Greenwich Mean Time G 10p or the 2019 Greenwich Mean Time G 10p. Start with the subject you enjoy, then add the date your set still needs. Our GMT coins from both years are in Uncirculated condition.
G 10p coin facts and issue history
Recognise the design: Meridian-marked globe with G. Both dates use this reverse; read the year on the Queen's portrait side.
- Denomination and metal
- 10p, nickel-plated steel
- Size and weight
- 24.5 mm, 6.5 g
- Edge
- Grained
- Design attribution
- The Royal Mint Team (reverse); Jody Clark (obverse)
These specifications are recorded in The Royal Mint's G issue archive. The official design proclamation describes the motif and edge.
Circulation mintage: 220,000 for 2018 G and 84,000 for 2019 G. These low circulation figures explain the rarity of these dated coins in change. They exclude collector editions and do not count the Uncirculated coins available today.
The alphabet series launched in March 2018. The 2019-dated circulation rollout began in February 2019, according to the original programme FAQ. For bags, cards and albums, see our packaging comparison.
Primary records checked 11 October 2026.