Exactly, this is Soviet experimental medium anti-tank (not assault if to be 100% correct!) SPG SU-101, which was built by "Uralmash" (Ural Engineering Plant) in spring 1945.
That SPG (SU-101 or "Uralmash-1") had a new progressive design, which made possible to install more powerful guns than of serial SU-100 and more strong armor. SU-101 was armed with 100 mm gun D-10S and the similar SU-102 was armed with 122mm gun D-25S. Both were based on the chassis of the new medium tank T-44.
The photo I've posted shows SU-101 during ground tests in summer 1945 - http://www.weapon.df.ru/tanks/sovsau/me ... lmash1.jpg
The Aufklarung's modern photo is from the Russian Kubinka Tank Museum (Moscow Region) - http://www.tankmuseum.ru/images/p2/su-101.jpg
On the same site I found a very interesting photo - http://www.tankmuseum.ru/images/pav1-4.jpg (Soviet super-heavy SPG with double treads and round hull!, 1957)
http://www.nemo.nu/ibisportal/5pansar/5 ... oyanov.jpg




Specifications of SU-101: weight 34.1 t, crew 4 men, armor 40-122 mm, armament - 100 mm gun D-10S (35 shells) + 1x7.62mm DT + 12.7mm DShK, engine V-2-34 500 hp diesel, speed 54 km/h, range 350 km.
SU-101 was very powerful AT SPG, it had excellent maneuvrability and strong armor (better than of much more heavy IS and ISU), but it was not very convenient for the crew because of the relatively small fighting compartment. Serial production of SU-101 was rejected because of the end of WWII, also Soviet Army had already a lot of serial SU-100s and the serial production of new main battle tank T-54 with 100mm gun should be started soon.
Blueprints of SU-101: http://blitzhaja.dothome.co.kr/bbs/data ... SU_101.jpg
Please, your turn!
