Finally, we have the T-26 M39 (conical turret) model.
T-26 Model 1939 (produced 1939-1940) (1,538 built without radio) (493 build with radio)
How to recognize:
One conical turret (same as Model 1938)
Larger redesigned superstructure with sloped sides extending over track guards Different mix and placement of spares, tools and accessories attached to the hull.
Whip antenna now used for all radios. Air intake for engine now protected by rounded (rumble seat) shield. Increased armor.
• All were armed with a Model 1938 45mm 20K cannon
• All were armed with one DT MGs (coaxial)
• Some were armed with a second DT MGs (ball mount in rear of turret)
This last model is the one that uses the taller, wider superstructure (shown to the far right in the Rubicon photo on page 6). Note that in the Rubicon picture, they have label an M-39 turret with the antenna around it. That is wrong. By the M39 version, they had moved to a whip antenna. So that is really an M38 with a horseshoe antenna on it.
Here is the top view of the M39:
There was one more variant known as the T-26E (or T-26S) which was built by bolting on additional armor plates to earlier versions of the T-26. They did this to M33, M36, M38 and M39 models. The plates were added to the very front of the hull, the front and both sides of the superstructure, and all around the turret. Only 80 were built, and they were initially sent off to fight the Finnish, but some were still around when Germany invaded. The Rubicon kit does not include additional plates of armor we can use, so we cannot accurately built this version. But we can model it with some work.
The easiest one to do would be this welded one (using flat, not curved plates, and no bolts). This is a T-26S (of an M39 - note the larger superstructure):
Still, in the end, we have all the bits to build the M31 (both turret armament configurations), M33, M33RT, M38, M38RT and M39, along with the KhT-26, KhT-130 and KhT-133. That is 10 separate builds!
With some work, the M33 turret can be changed into the M36 and M36RT, giving us two more builds.