http://www.beutepanzer.ru/Beutepanzer/uk/MK_V/Mk_V.htm
Wiki says:
In 1945, Allied troops came across two badly damaged Mk V tanks in Berlin. Photographic evidence indicates that these were survivors of the Russian Civil War and had previously been displayed as a monument in Smolensk, Russia, before being brought to Berlin after the German invasion of the Soviet Union in 1941.[1] Accounts of their active involvement in the Battle of Berlin have not been verified.[2]
https://www.greatwarforum.org/topic/...s-berlin-1945/
Mark Felton article (of course, he has doen the subject already!
:
https://www.youtube.com/watch?v=ElzZ7KZW9M0
And also from Wiki, more obsolete junk:
Vickers Mediums:
English Workman: the nickname given by the Russians to 15 (or 16) Vickers Medium Mk.IIs purchased in 1931. This variant had no cupola, less pronounced turret bevels, and cowled ventilation fans on the hull sides. About half a dozen were found without engines or guns by Finnish forces near Vitele in autumn 1941 during the Continuation War.
What exactly they were doing up there - who knows.