Congrats! A lovely souvenir from Japan indeed
I read through your blog write up. Sounds like you had a great time here. The SP 2005 was my first rangefinder (was a Nikon SLR shooter up to then) and the amazing IQ of the wonderful reissue W-Nikkor 35/1.8 is what started me on my rangefinder journey.
Let me point out a few errors in your write up regarding Nikon's history.
> You wrote "Formed in 1917 it was originally known as Nikkor"
* Nikon the company has never been called Nikkor. That's a brand name for lenses that was introduced in 1932.
> You wrote "Nikon actually started as a lens manufacturer for these screw-fitting rangefinders"
Nikon (Nippon Kogaku back then) was formed through a merger of three smaller optical companies via significant governmental input with the main intention of making Japan fully self sufficient for its military-related optical glass needs. The Japanese government wanted the ability to make quality optical glass domestically instead of relying on overseas suppliers. As such, Nikon was from the get go an integral part of the Japanese military-industrial complex. Nikon certainly also manufactured consumer oriented products such as screw mount lenses from early on, but that's not how they started.
Also, the story on cameraquest.com about the lottery is not really how it went down. Most SP 2005 sets didn't sell at the initial asking price and ended up being heavily discounted (more than %40 off!) to try and move them. In early 2007, I remember one time seeing eight or so brand new SP 2005 sets lined up under the counter at Fujiya Camera in Nakano, Tokyo. Other times only four or five. Fujiya must have sold dozens of them, because they turned over new sets well into 2008.
So, lets not add any further to the "Nippon Kogaku was making lenses and cameras out of a garage when they were discovered by some Life magazine photographers" misinformation that floats around the internet, ok
The Life Magazine photographers certainly helped promote Nikon's products overseas but that so called garage was actually the Nikon 101 building, which at the time was a 4 story above ground 1 story below ground concrete building completed in 1933 (one of just a handful of concrete buildings in Tokyo back then) with three wings making it look like the letter "E" when viewed from above. Quite a big garage that, being concrete rather than wood, was one of the few buildings to survive the fire bombing of Shinagawa Ward in 1945.