This ugly duckling is the C53 No. 43. Why it had to be streamlined, I don't know: design speed is supposed to be a mere 95 km/h...
I found it when I re-visited a long ago bookmarked link (Gunter's Locomotive Page) for a completely different reason, and found it grew a lot - now with a long list of streamlined locos. *Lunatic*, n. One whose delusions are out of fashion.
The reason the speed was capped at mere 95 km/h is the terrain and the narrow gauge (1067 mm). Even today, except for Shinkansen, we still use 1067 mm. I will become a patissier, God willing.