These clocks are fairly easy to find, particularly as it is thought that they are still made by the original factory for the tourist trade. The winding and setting method is rather neat. This one is for sale on another forum...
Seller's description:
"First is a clock from a Soviet T-34 tank. Designed so that there were no parts sticking out to catch on clothing or equipment, the clock is both wound and set by pulling out and turning the bezel. It appears to have a power reserve of around two days when fully wound and works well".
No mention of whether it was removed from a tank...
Here's the link to the Wikipedia entry on the T-34
http://en.wikipedia.org/wiki/T-34.
The same seller also has a Slava split-second stopwatch for sale, of the type used in the Russian Space Programme...
Seller's description:
"Second is a Slava split-seconds stopwatch - As used by the Soviet Space Program! A photo of it in action can be seen on Ill-Phill's website, at the bottom of the page here: http://www.netgrafik.ch/russian_space_watches.htm. This has two second hands (red and green), both of which can be stopped independently so that two times can be kept. The dial counts up to 30 seconds, then records a half-minute on the inner hand/totalizer. This comes with the original wooden box, lined with padded green corduroy to keep the stopwatch safe".
Regards
Jon'.