Xiao, it's been a few weeks since I looked at the IdlF collection, but I remember it much more as 1940's. Then again the 40s and 70s have a lot of overlap, as I assume that was just the vintage clothes available at the time.
Hairy, I was going to offer to share my boots list for other options that I keep on Shoptagr but selfishly I don't want to undermine the NYC fashion spends as I want to see it all. but will share if I must WRT Yoox it's handy for things like the boots, if you have something very specific in mind, the filters are pretty good. I also check it for obscure brands that I don't want to pay full price on and aren't that popular on which I wait out the price and I'm not all that mournful if I lose out on it. They do a lot of limited offers so it's just a matter of striking when the price is right. It used to be a lot simpler and cheaper than in the early days.
Is the velvet jacket navy or black? I like velvet but always find it a bit dusty looking in black unless it's proper velvet which is a rare thing to come across these days. Brita stole and new purchases look great too.
Your outfit sounds lovely, Catharine, and great to hear it made you the recipient of compliments
Elle, the tone on tone looks great and love the white coat with it. I may have seen that shirt from COS in the shop, possibly a different colour, they often get things in the shop before it's online.
UW = United Wardrobe, it's a bit like depop, I think active in the Benelux, France and Germany for now.
Yoox deliveries vary with me, can be anything from 2 days to a week, I find if you order on the weekend it always takes longer to dispatch.
Xing, not sure I'm ready to revisit avocado bathrooms but I would like to see a bit more adventure with natural stone and marble happening that isn't Carrara marble.
Peregrane, I'm a very visual person, can't help but inflict vivid imagery on others 
Okay mememe time. Went to Mango and am all for winter white. I'll figure out the whole keeping it white later. The brown houndstooth coat I went in for wasn't there despite the website saying they had stock
but was easily distracted by the off white skirt. They also had 70s boots in black but they do not pass the foreskin test.
I then tried on lovely white roll neck dress/jumper on top and loved the effect. Not that keen on the material as it's a lot of synthetic despite being labeled as wool
blend
Think I'm going to be hard pushed to find a natural version though as the weight would just be too much unless it's cashmere and that would cost a fortune.