
All material and reconstructions are by A. Karevskiy.
The main sources for this material are:
Tatarov, B. "Czechoslovak Military Formations in Russia: Part 1, 1917-1918 // Staryi Tseykhgauz, No. 5-6", Moscow, 2015. pp. 54-76; and " ... Part 2, 1919-1920 // Staryi Tseykhgauz, No. 3", Moscow, 2016, pp.73-83.
Orian, E., Panus, B., Stechlik, E. and Steidler, F. "Ceskoslovenska Legie v Rusku, 1914-1920", Prague, 2014.
Bullock, D. "The Czech Legion // Men-at-Arms No. 447", Oxford, 2007.

Sleeve shields of staff and students of military educational institutions:
First row: Czechoslovak Officer School:
1 and 2 – lieutenant-colonel and lieutenant of the teaching staff; 3 – sergeant-major cadet;
Second row: School of Service and Medical Dogs:
1 – lieutenant, veterinary service, teacher; 2 – second-lieutenant, infantry, teacher;
3 – private, student
Until May 1919 it was the Czechoslovak Infantry Officer School.
By Army Order No. 64 of 30 September 1919 its cipher, for both staff and students, was established as intertwined letters "D" in red and "S" in white (the initial letters of "officer school" in Czech).
Army Order No. 130 of 12 December 1918 established a dog's head insignia for the staff and students of the school. The reconstructions are approximate, assuming a metal sheep dog head for officers and cloth appliqué for lower ranks.

Uniforms of staff and students of the military educational institutions.
Figure 1 is reconstructed from a photograph. Figures 2 and 4 show the so-called "Vladivostok uniform", introduced by Order No. 41 of 21 June 1919.
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The original for this page is at kolchakiya.ru/uniformology/czech/educational_institutions.htm.
Discussion on the translation choices I have made can be found here.