The military cold weather stuff I have, is stored away at the moment.... so you'll have to do with internetpics.
But those German mittens really are good! I also found (literally) The Swedish M59 cold weather cap, as in the OP, but haven't had the chance to really test it. Looked and felt good, though.
M59 pälsmössa;
My German wool (replica) M43-cap, in combination with the later mentioned scarf;
I'd like to add Swiss wool mittens with leather (in dry frost)
The Swedish M39 wool uniform. No need for longunderwear, even at -20.
The Swedish M59 overcoat; It reaches down to just over the knees, has a detachable coldweather innerlayer and is very roomy.
British army (I think) wool jumper; Similar to this one, but with suede shoulder- and elbowpatches. Made in Scotland and keeps it's shape, meaning it does not become baggy and loosefitting when worn. I have similar Dutch ones, but these are not nearly as warm.
Dutch army tubelike scarf. I still have the '80's green version, which I think is better made.
My Dutch army 1953 leather jerkin. Ideal as a windbreaker + Swiss army gaiters, ideal in snow;
And combining the lot, you could end up looking like this
;
And I have one of these long wool coats from the '50's. Not for fielduse (yet), but I just love it and it's warm! It is heavy, true, but that gives me a bit of a snuggly, cocoony feeling... weird, I know.