Hi Collins,
The Trumpeter kit gives you the Model 1942 hull which was introduced at the beginning of 1942 with thicker (90mm rather than 75mm) armor on the sides. It also had the angular rear hull overhang. It was manufactured alongside the earlier Model 1941 hull (with the rounded overhang) until June 1942, and then on its own until September when it was phased out in favor of the KV-1S.
This type of hull was fitted with the 'Simplified Welded' turret as well as both types of cast turret. You can swap turrets between the Trumpeter kits if you wish. See the 'recipes' on
www.4bogreen.com for details.
Here's a photo of a Model 1942 with the lightweight cast turret (left) alongside another with the heavy cast turret.
![](https://gallery.kitmaker.net/data/500/KV-1-M1942-10.jpg)
The log was an unditching beam that featured chains on each end which could be attached to the tracks across the bow of the vehicle for additional traction to get the vehicle out of a ditch or thick mud. This is documented in the TM for the KV-1S.
Cheers,
Neil