Well, the wreck looks like it had rather been stripped of anything of use than burned out few days later.
For me it looks like it was burned out - maybe it is some kind of strange shadow, covering almost the whole tank, but most likely it is a scare which left after burning out.
I don't think that Germans burned out their own tank, after it was immobilized - so most probably it was Polish job.
The wreck itself might have already stood there for a while - even since early September. 'Tidying up' always takes time
Of course this explanation is also reasonable and probable - this can explain horrible losses and drops of tanks number in armoured units, while Germans managed to repair or canibalized the most part of those lost tanks after the end of the campaign or after the long period of time - before that those tanks were of course gathered together and transported to repair shops, many kilometers to the west or to the north - or to Czechoslovakia - (for example in 1941, in the eve of Fall Barbarossa, German units from Bialystok had their repair shops in Poznań):
For example untill the morning of 12th of September, number of tanks in 3rd Panzer-Division decreased to less than 75% of the initial quantity (in Panzer-Regiment 6. only 119 tanks - including 55 Pz-I, 55 Pz-II, 3 Pz-III, 6 Pz-IV - of 160 at the beggining - including 67 Pz-I, 79 Pz-II, 5 Pz-III, 9 Pz-IV - left). And what is significant - this division suffered most only after the 11th of September - mostly during the battles of Andrzejewo, advance towards Brześć, battle of Brześć, advance towards Włodawa, heavy battle in Włodawa region against units from the Northern Front (41. Dywizja Piechoty - Infantry Division - on 19. IX), and the battle fought against GO "Polesie" under general Kleeberg between Brześć and Kobryń - from 14th to 19th of September.
In the late evening of 17th of September, Panzer-Regiment 35. had only 60 tanks (this is exact number) of 177 with which it was starting the campaign - so the combat-strenght of P-R 35. decreased - during the first 17 days of fight - to less than 34% of the initial power - and during the next few days of fights its combat-power decreased again due to heavy losses sustained in the battle of Bzura and Kampinos Forests.
Losses of the Panzer-Regiment 36. were even higher or at least similar, and it also had fewer tanks at the beggining of the campaign than its sister Regiment.
And these figures really shows us how fierce the Polish resistance was.
The most important thing was how many tanks left in the unit and how many were eliminate from its ranks.
How many of those lost tanks finally Germans didn't repair (or repaired) after several or more months / weeks, in a long-time repair after long transport to repair shops - was inessential.
-----------------
To summ up, let mi add, that in 1943 / 44 / 45 the vast majority of German "irreparable panzer-casualties" - were in fact not tanks that were unable to repair, but tanks that were immobilized (often they were only lightly damaged, or ran out of gasoline) - then were left on the battlefields and captured by Eastern / Western Allies forces - as Germany's army was constantly being push back by consecutive succesfull offensives of their enemies.
One more thing
(ploughed fields, trees without foilage, soldiers wearing greatcoats).
What do You think, Njorl, about the third photo from Sochaczew from Towarowa street (this one showing destroyed Pz-III) - was it taken in October? - the soldier standing on the tank is in Autumn uniform I think.
If i'm right, those three wrecks were probably standing in Sochaczew (and rusting) untill October or even November.
Regards