There were a couple of these Soviet vehicles outside the boundary at the museum. They appear to have had the attention of some vandals. There were no plaques or markings. I checked on the web and it appears to be an MT-LB, but I'm willing to be corected. The main weapon looks very similar to the US 37mm M3, as fitted to the Staghound armoured car. I'm wondering if it wasn't a Soviet copy of that weapon.