For a discussion on this 'twin-fish' motif as an auspicious symbol of harmonious marriage and good fortune, see S. Pierson, Designs as Signs: Decoration and Chinese Ceramics, London, 2001, p. 19, where a smaller Longquan dish (15.1 cm. diam.) from the Percival David Foundation is illustrated, op. cit., no. 11. Also cf. two closely related examples, the first from the Cunliffe collection, sold at Bonhams, 11 November 2002, lot 61; and another dish dated to the Yuan dynasty with a crackled glaze, formerly from the George de Menasce collection, illustrated by J. Ayers, Chinese Ceramics, The Koger Collection, London, 1985, p. 62, no. 39.