Lol, everybody offers streamline locomotives when I post a 52.
The Reichsbahn Class 52 was maybe the exact contrary:
A perfect example of KISS. The german war machine needed steam locomotives in WW2, so an emergency program was created to build these extremely simplified cargo locomotives. Over 2000 were build.
They were designed to last 5 years, the last one left service 1993! In east Germany (railway wasn't unified until 1995), that is, in Poland they lasted even a few years longer and Russia alledgedly still has them in storage.
I've seen one in a museum that had dozens of patched .50 cal holes and still served another 40 years.
These things can haul stuff around, but certainly are not fast and won't win any beauty contest.
The Reichsbahn had streamlined engines as well:
Allready shown, engine 05 001, build 1935. Class 05 was some kind of "Über-01"
The Mallard beat this one by a mere mile per hour and had a downhill track.
Also there is the 18 201, the fasted operational steam locomotive in the world
Privately owned, can do 180 km/h.
This singleton was, for testing purposes, build by the GDR in 1960.
Or better, they build it out of this one, the Henschel-Wegmann experimental streamlined locomotive from 1939.
These are actually the same engines.
But my favorite is still the DR class 01, the "Flagship" of the Weimar Republic era Reichsbahn
01 118, build by Krupp in 1934, same owners as the 52 in the first pics.
Still in original condition, served continously from 1934 to 1984.