day late and a dollar short, however...
Great kit, but Tamiya missed the mark on research.
The differences in this kit nd the original is not Soviet specific - This kit portrays a Late Mk. III, early Mk. IV Matilda.
The original release is an early Mk. III.
Tamiya even provides (in parts not used), a 3 inch Howitzer barrel, low profile copula, and non-louvered storage locker doors.
Great kits!!
Andy