150th Anniversary of the London Underground - The 'Roundel' Design

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Specifications

Issued 2013
Diameter 28.4mm
Weight 12g
Composition Outer: nickel-brass 76% copper, 4% nickel, 20% zinc
Composition Inner: Cupro-nickel 75% copper, 25% nickel
Obverse Ian Rank-Broadley
Reverse Edwina Ellis
Edge Milled
Inscription Mind the gap
Mintage 1,560,000
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Design details:


Edwina Ellis, creator of this ‘Roundel’ coin, is a pioneering printmaker and former ‘Art on the Underground’ artist. Her design, featuring the famous logo which first appeared in 1908, carries the edge inscription MIND THE GAP and uses lettering in the unique Johnston typeface used for London Underground signage.
 

text source and credit the Royal Mint