Ephemera › HS 4421 - Invoice from Gray, Dunn & Co., Biscuit Manufacturers, Kinning Park, Glasgow 1924 Image 1 of 1 HS 4421 - Invoice from Gray, Dunn & Co., Biscuit Manufacturers, Kinning Park, Glasgow 1924 £27.00 Established 1853, royal appointment granted May 1891. Some ageing. Two filing holes in left margin. Add To Cart Added! Established 1853, royal appointment granted May 1891. Some ageing. Two filing holes in left margin.