The Hangar construction looks quite a work of art as well!!!!

Oh, does it? I have no clue about hangars…
But it is a real WW2 hangar. Vesivehmaa airfield was built between the Winter War and Continuation War, and it was a training airfield and the advance training squadron of FiAF. Practically every single pilot who came into the AF during Continuation War spent time in this airfield, and most likely in that hangar too, learning the more advanced skills of flying.