The seismic traverse had originated at Komsomolskaya (335 miles north of Vostok) on 11/6/59, using five tractors and ten towed sledges for the first leg. The Vostok-South Pole trip, 800 miles each way, used 3 large tractors and 4 sledges. The first two vehicles seen here are heavy 35-ton Kharkovchanka ("snow tractor" or perhaps "chunky vehicle built in Kharkov") machines. These were the second generation of Russian heavy traverse vehicles, designed for the annual inland station resupply trips. They had been delivered to Mirny and driven to Komsomolskaya the previous summer. Powered by 520-hp V-12 diesel engines, they were truly huge and heavy--14' wide and over 30' long...but the engine could power them to speeds up to 20 mph. The cab could seat at least six people; the rear of the hermetically sealed body was divided into multiple compartments--perhaps a bunkroom for 10 people, along with galley, head, office and comms rooms. Below are two additional photos of #23, the second vehicle in the lineup above. The one at left was taken at the Malyshev factory in the Ukraine before shipment (source: the photo was downloaded from the factory web site in 2004, the photo/link no longer exists). The photograph at right was taken by Vladimir Evseev at Mirny in 1965. Source and credit: Russian "Antarctic Research and Investigation Program," http://south.aari.nw.ru/ (the photo pages are in this frame). Note the size of the vehicle relative to the man on the roof! (More details and photos of the Kharkovchanka tractors can be found on the second half of this Russian language site.)
After arriving at Vostok on 11/29, the equipment for the trip to Pole was selected and serviced. The 16-man team left Vostok on 12/8. They stopped for seismic readings every 125 miles and arrived at Pole on 12/26. In addition to the seismic work at Pole, they also drove their vehicles "around the world" (circling the ring of 55-gallon drums) in 15 minutes, for which they were given special certificates. The group departed on 12/29 and reached Vostok on 1/8, from where the party was flown out to Mirny.
[Source and credit for Pole photo: Soviet Geographical Explorations and Discoveries, by N. A. Gvozdetsky; English translation by Anatoly Bratov, 1974. And thanks to Alex Zaitzev for the book!]