Trumpeter 1/35 Trumpeter Object 490BDescription The Object 490B Belka is an alternative design proposed for the Object 490 main battle tank after the decision in 1984 to use a 152mm smoothbore gun on the future Soviet MBTs instead of the 125mm smoothbore gun. The Object 490B vastly differed from the original Object 490A design had an extremely sloped steel frontal armor instead of composite armor and four sets of tracks. The design had a two man crew placed at the rear of the vehicle