The portrait of Victoria was engraved by Charles Heath and his son Frederick, based on a sketch provided by Henry Corbould. Corbould's sketch was in turn based on the 1834 cameo-like head by William Wyon, which was used on a medal to commemorate the Queen's visit to the City of London in 1837. This portrait of Victoria remained on British stamps until her death in 1901, although by then she was 81 years old. All British stamps still bear a portrait or silhouette of the monarch somewhere on the design. The first stamps did not need to show the issuing country, so no country name was included on them. The UK remains the only country in the world to omit its name on postage stamps; the monarch's image signifies the UK as the country of origin.