| 1752 | December Birth of Miles Mason in Yorkshire |
| 1760s | Miles Mason moves to London, possibly as apprentice to his uncle, John Bailey. |
| 1775 | Death of Richard Farrer, china dealer of Fenchurch Street, London, leaving a fortune of £30, 000 to his daughter Ruth. |
| 1782 | Miles Mason marries Ruth Farrer, and takes control of Richard Farrer's china retailing business. |
| 1783 | Birth of Miles and Ruth Mason's first child, Ann Ruth. |
| 1783 | September Miles Mason becomes a Freeman of the Glass Sellers Company. |
| 1785 | January 27 Miles and Ruth first son, William, is born. |
| 1789 | May 9 Their second son, George Miles, is born. |
| 1791 | July 16 Their third son, Charles James, is born. |
| 1796 | Miles Mason enters into a porcelain-making partnership with Thomas Wolfe and John Lucock at the Islington Pottery, Liverpool (known as Thomas Wolfe & Co.). |
| 1796-1800 | Miles Mason enters into a partnership with George Wolfe to manufacture pottery at the Victoria Pottery, Lane Delph, Staffordshire. |
| 1800-1806 | Miles Mason continues production alone at the Victoria Pottery, Lane Delph. |
| c.1802 | Miles Mason gives up his interests in the retail premises at Fenchurch Street, London. |
| 1806-1813 | Miles Mason takes over the larger Minerva Works, Lane Delph, Staffordshire. William Mason, his eldest son, becomes a partner. |
| 1808 | January 12 William Mason marries Susannah Heming of Mapleton, Derbyshire. |
| 1811 | Miles and William Mason take over Sampson Bagnall's Works, Lane Delph, Staffordshire. |
| 1813 | Charles James Mason takes out a patent on ironstone china for 'making English porcelain'. Mason's purchase the Fenton Stone Works, High Street, Lane Delph, Staffordshire. |
| 1813-16 | George Miles and Charles James Mason take control of the Minerva Works. |
| 1814 | February George Miles Mason marries Eliza Heming, sister of William's wife, Susannah. |
| 1815 | August Charles James Mason marries Sarah Spode. |
| 1815 | William Mason has opened a pottery retailing business at 1 Smithy Door, Manchester. |
| 1822 | April 26 Miles Mason dies, and is buried at Barlaston, Staffordshire. |
| c.1822-4 | William Mason listed in the Rate Books as the tenant of a pottery at Fenton Culvert. |
| c.1824 | Samuel Bayliss Faraday is made partner in the Mason's business. |
| 1826 | George Miles Mason retires. The firm continues trading as C.J Mason & Co. |
| 1834 | Death of Ruth, wife of Miles Mason. She is buried at Norbury, Derbyshire. |
| 1836 | Charles James Mason becomes an active member of the Potteries' Chamber of Commerce. |
| 1840 | Samuel Bayliss Faraday is made partner in the Mason's business. |
| 1844 | Chartist riots in Staffordshire. |
| 1844 | Death of Samuel Bayliss Faraday. Charles James Mason is declared bankrupt. |
| 1848 | Francis Morley buys the Mason patterns and shapes and removes them to the Broad Street Works, Hanley, Staffordshire (present site of Mason's ironstone factory). |
| 1850-8 | Firm trades as Francis Morley & Co. |
| c.1851-3 | Charles James Mason enters into a second pottery manufacturing venture at the Daisy Bank Works, Lane End, Longton, Staffordshire. |
| 1852 | Charles James marries for the second time, to Miss Astbury of Longton. |
| 1853 | Charles James is forced to sell the factory for a second time. |
| 1856 | Death of Charles James Mason. He is buried at Norbury, Derbyshire. |
| 1858 | Francis Morley forms a partnership with his son-in-law, Taylor Ashworth, trading as Morley & Ashworth. |
| c.1862 | Death of William Mason. |
| 1862 | Francis Morley retires from the business, passing the effects to Taylor Ashworth. |
| c.1861-1968 | The company commences trading as George L. Ashworth & Bros Ltd. |
| 1883 | December is purchased by John Shaw Goddard, son of a china exporter. |
| 1884 | January Ashworth's becomes a limited company. |
| 1919 | John Vivian Goddard succeeds his father. |
| 1968 | March The firm changes its name to Mason's Ironstone China Ltd. |
| 1973 | April Mason's join the Wedgwood Group and are renamed Mason's Ironstone. |
