The stem is indeed a folding stem. Came with the bike when it was made in 2011. They used to offer them. A little flexier, needs more maintenance as otherwise they end up quite creaky. And with alt-bars they don't mean you fold nice and narrow (the removable stem is better in that regard). But it is nice to have the stem attached to the bike when folding. I'm actually in the process of getting the standard fixed stem built. Mostly because I'm worried about their longevity after 15 years (Kalloy Uno still make them but still) but also because I want to see how the bike handles with the standard fixed stem and because I like the idea of a tighter package when putting it into a Rinko bag, the car, etc.

They are indeed Rene Herse cranks! In the picture it was a 16T difference. 48/32T. I recently replaced the old chainrings as they were worn and struggling to bite to go from small to big after years of hard riding. Its now 48/33T, a 15T difference which is what Rene Herse now recommend. And new chainrings from them now have ramps and pins, after years of not offering them. These new ones shift like I've never experienced before on any bike! An expensive extravagance and definitely fail any cost to performance analysis thanks to the law of diminishing returns. But man do I love them!
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​​​​Overall its a 2 x 10. Cassette is a 10-speed Shimano XT CS-M771-10 (11-36T) paired with a 9-speed XT RD-M772. Don't ask... Somehow it just works. Can get the full 20 gears so long as I run 1.75" wide tires. Only when its on the small chainring and big rear cog does it get close to touching the wheel; very very close but just good enough if I need a serious bail out. I think its something like 16 gear inches when it was 32T up front (not sure with the new 33T) which as you can imagine is rarely needed, even fully loaded climbing thousands of meters up. On wider tires (2.15" maxxis holy rollers) I can't use the full range but can happily limit it to a 2 x 8 setup via the limit screws (28t max at rear) and have still found it more than sufficient on long fully-loaded tours with very big elevation gain (2 x 9 with a 32T max rear also works but requires constant adjustment to keep it off the fatter tire). One day I'll try to see if I can go fat AND 36T with a new 9 or 10 speed derailleur and cassette. But I like it currently as it is. Totally silent and smooth drive train that's yet to fail me! When paired with my new powerblock s-spec folding bead tires (310g only) the bike glides!