Sdkfz171 Panther with a rather large barrel cozy. It also looks to not have a muzzle brake (no bulge at the end of the barrel)
Panzer IV & her crew.
The commander is wearing a mouse grey reversible parka. The bow gunner/radio man has on a great coat.
**Just found the second photo. Notice the “Ostketten” or “East tracks” these are extensions that were attached to the regular tracks to spread out the ground pressure to prevent sinking in deep snow or mud.
Some great detail in this picture.