Those last 5 photos seems to be taken in a history museum...I think they that sort of thing in Japan too of the time before WWII. Those ones in the photos represent very well of S. Korea in the 70s and 60s or even before...which is ironically similar to what North Korea looks like these days. Hmm...
Thanks for sharing the photos... You seemed to stay in Gangbuk(the historic Seoul and old downtown area near Seoul Station and the City Hall). I think you should visit Gangnam next time. That's where Seoul's "new" and "younger" downtown streets seem to be located these days. Gangnam subway station on the green line might lead you to the right place.