That's Soviet MBV-2, two were made in Kirov manufacturing plant in Leningrad in 1936-37, though i guess the transformation of one of them into a Thomas was post war development (second one is preserved in museum).
That's Soviet MBV-2, two were made in Kirov manufacturing plant in Leningrad in 1936-37, though i guess the transformation of one of them into a Thomas was post war development (second one is preserved in museum).