The first two are KRUG interiors, not OSA!!!Thank's, Post corrected !
Another corrections:
The first time I have see this working area, I asked my self what's inside this closed rack ? not seems to be for electronics stuffs !
there is no light indicators, no testing points, no scaled Volt-meter or Ampere-meter, ... and so !, not so serious electronics inside closed doors, for the first look !
....
Telephone Switcher -17 lines- (like P-193 Russian telephone switcher, only 10 lines !) : 
