This submarine depict on this stamp is the single hulled BARS built on the Baltiyskiy Zavod in Petrograd (now St Petersburg) after a design of Ivan Bubnov also depict on the stamp. She was based of the designs of the Akula class submarines.
Ordered September 1912.
20 July 1913 laid down
02 June 1915 launched as the BARS (Snow Leopard) one of a class of 24 boats.
Displacement 650 ton surfaced, 780 ton submerged. Dim. 68 x 4.5 x 3.9m.
Powered by two British Vickers diesel engines 2,640 hp, and two electro motors, 900 hp, twin shafts, speed surface 18 knots and submerged 10 knots.
Fuel capacity 40 tons, range by a speed of 17 knots on the surface, 400 mile, submerged by a speed of 9 knots, 25 mile.
Armament: 1 – 63mm gun, 1 – 37mm AA, 4 – 457mm torpedo tubes, two bow and two stern, carried 8 torpedoes.
Crew 33.
25 July 1915 commissioned under command of V.F. Dudkina.
After commissioned joined the 1st Battalion Division submarines of the Baltic Fleet.
1915 She was tested to carry up to 8 mines but it did not work out and the plan was shelved.
Late 1915 under command of N II’inskii.
Took part in World War I and was used for war patrols in the Baltic, escorted mine laying ships, and controlled merchant shipping, attacking torpedo boats and enemy merchant ships, and she came herself also under attack.
February 1917 her crew took part in the February revolution.
Her last patrol the fifteenth she left on 06 May 1917 from her base, and she was lost on 28 May 1917 off Norrkoping with the loss of 33 crew.
2013 Till so far the location of the wreck has not been found. Wikipedia gives that she is found north of Gotland Island, but that is believed an other boat of her class.
Russia 1993 100r sg6473 , scott6172
Source: Log Book. Mr. Gennadiy Sitnikiv. Wikapedia