For similar inkstands see Christies King Street, Russian Art June 9th 2009 lot 145.
Z. A. Bernyakori, et al., The State Hermitage, Notable Russian Works of Art, Moscow, 1977, no. 26.
N. V. Kalyazina, G. Kamelova et al., Russian enamels of 12-20th centuries from the collection of the Hermitage, Leningrad, 1987, p. 19, illustration no. 41.