The 12.10 - a superlative locomotive now fully restored (filmed with a Sony FDR AX700 in 4k UHD)

The 12.10 is the fastest, most powerful and largest express steam locomotive ever built in Austria. From a technological point of view it marks the high point of locomotive construction.
The projection starting at 5:50 shows many of the technical details.
You can visit the impressive 12.10 and other wonderful artifacts at the Technisches Museum Wien.