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Specifications
Edge: Smooth with text
Weight: 7.0 grams (actual weight is 6.78)
Diameter: 26 mm (actual diameter is 26.12)
Composition: Copper-nickel (75% Cu, 25% Ni)
Minted: Royal Mint (Tower Hill), London, United Kingdom (1810-1975)
Mintage: 4,000,000
More information at https://en.numista.com/catalogue/pieces54603.html