WW2 German Jackboots

I came across these WW2 German enlisted mens hobnail jackboots, which were listed on the local classified ads in Edmonton Alberta recently. They are unissued and pretty much pristine. The only creasing is where they have been stored flat for many years which resulted in a slight crease centrally, but no wear-type creasing at all. I will try to relieve these creases over time with a boot tree.
When I got them the only condition issue with them was they had been 70+ years without any form of polish or leather care. I fed them with Pecards Antique Leather dressing and Pecards Black polish.
Apart form the numeric marks on the soles there don't appear to be any makers marks. Inside the shafts it appears that there is an extremely faint "K" stamped into it. But this mark is very small and faint so it would be really tough to take a picture of.
The pull straps are perfect (a little creased in one boot) but they appear to never have been pulled with zero wear or fraying.
All in all I think these are premium examples of this iconic German boot, with perfect gleaming hobnails and heel irons.
Even though I have inspected these boots really closely without finding any clear makers marks I would still like to know if there is any way to identify a maker. So if anyone has any ideas that would be great.