Two penny blue to be sent anywhere within Britain; the Two Penny Blue's weight limit was a full ounce. Two penny blue The Two Penny Blue or The Two Pence Blue was the world's second official postage stamp, produced in the United Kingdom of Great Britain and Ireland and issued after the Penny Black. Initial printing took place from 1 May 1840, and in all 6,460,000 were printed from two plates until 29 August. Officially the stamps were valid for postage from 6 May but were only available from 8 May. It was first sold to the public at the London Inland revenue
Penny Black up to to be delivered at a flat rate of one penny, regardless of distance. Postal delivery systems using what may have been adhesive stamps existed before the Penny Black. The idea had at least been suggested earlier in the Austrian Empire, Sweden, and possibly Greece. On 13 February 1837, Sir Rowland Hill proposed to a government enquiry both the idea of a pre-paid stamp and a pre-paid envelope, a separate sheet folded to form an enclosure for carrying letters. Hill was given a two-year contract to run the new system, and together with Henry Cole he announced a competition