For a discussion of the model and illustrations of several examples with variations in the shape of the handle, all with the more commonly found stand with steeply angled straight side, see Rosalind Savill, The Wallace Collection: Catalogue of Sèvres Porcelain, London, 1988, vol. II, pp. 667-674, nos. C438-C440.
Etienne Evans is recorded at Sèvres as a painter specializing in birds 1752-1786.